diff --git a/Cargo.lock b/Cargo.lock
index 0dffca7..57db029 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -319,6 +319,7 @@ dependencies = [
  "clap",
  "csv",
  "encoding_rs",
+ "flate2",
  "int-enum",
  "lazy_static",
  "msg_tool_macro",
diff --git a/Cargo.toml b/Cargo.toml
index 1b7e3a3..61d30bf 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,6 +9,7 @@ blowfish = { version = "0.9", optional = true }
 clap = { version = "4.5", features = ["derive"] }
 csv = "1.3"
 encoding_rs = "0.8"
+flate2 = { version = "1.1", optional = true }
 int-enum = { version = "1.2", optional = true }
 lazy_static = "1.5.0"
 msg_tool_macro = { path = "./msg_tool_macro" }
@@ -19,12 +20,13 @@ serde_json = "1"
 unicode-segmentation = "1.12"
 
 [features]
-default = ["bgi", "bgi-arc", "bgi-img", "cat-system", "cat-system-arc", "circus", "escude", "escude-arc", "yaneurao", "yaneurao-itufuru"]
+default = ["bgi", "bgi-arc", "bgi-img", "cat-system", "cat-system-arc", "cat-system-img", "circus", "escude", "escude-arc", "yaneurao", "yaneurao-itufuru"]
 bgi = []
 bgi-arc = ["bgi", "utils-bit-stream"]
 bgi-img = ["bgi", "image", "utils-bit-stream"]
 cat-system = []
 cat-system-arc = ["cat-system", "blowfish", "utils-crc32"]
+cat-system-img = ["cat-system", "flate2"]
 circus = []
 escude = ["int-enum"]
 escude-arc = ["escude", "rand", "utils-bit-stream"]
diff --git a/src/ext/io.rs b/src/ext/io.rs
index 3f51307..693a8d9 100644
--- a/src/ext/io.rs
+++ b/src/ext/io.rs
@@ -6,9 +6,9 @@ use std::sync::Mutex;
 
 pub trait Peek {
     fn peek(&mut self, buf: &mut [u8]) -> Result<usize>;
-    fn peek_extract(&mut self, buf: &mut [u8]) -> Result<()>;
+    fn peek_exact(&mut self, buf: &mut [u8]) -> Result<()>;
     fn peek_at(&mut self, offset: usize, buf: &mut [u8]) -> Result<usize>;
-    fn peek_extract_at(&mut self, offset: usize, buf: &mut [u8]) -> Result<()>;
+    fn peek_exact_at(&mut self, offset: usize, buf: &mut [u8]) -> Result<()>;
     fn peek_at_vec(&mut self, offset: usize, len: usize) -> Result<Vec<u8>> {
         let mut buf = vec![0u8; len];
         let bytes_read = self.peek_at(offset, &mut buf)?;
@@ -17,190 +17,190 @@ pub trait Peek {
         }
         Ok(buf)
     }
-    fn peek_extract_at_vec(&mut self, offset: usize, len: usize) -> Result<Vec<u8>> {
+    fn peek_exact_at_vec(&mut self, offset: usize, len: usize) -> Result<Vec<u8>> {
         let mut buf = vec![0u8; len];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(buf)
     }
 
     fn peek_u8(&mut self) -> Result<u8> {
         let mut buf = [0u8; 1];
-        self.peek_extract(&mut buf)?;
+        self.peek_exact(&mut buf)?;
         Ok(buf[0])
     }
     fn peek_u16(&mut self) -> Result<u16> {
         let mut buf = [0u8; 2];
-        self.peek_extract(&mut buf)?;
+        self.peek_exact(&mut buf)?;
         Ok(u16::from_le_bytes(buf))
     }
     fn peek_u16_be(&mut self) -> Result<u16> {
         let mut buf = [0u8; 2];
-        self.peek_extract(&mut buf)?;
+        self.peek_exact(&mut buf)?;
         Ok(u16::from_be_bytes(buf))
     }
     fn peek_u32(&mut self) -> Result<u32> {
         let mut buf = [0u8; 4];
-        self.peek_extract(&mut buf)?;
+        self.peek_exact(&mut buf)?;
         Ok(u32::from_le_bytes(buf))
     }
     fn peek_u32_be(&mut self) -> Result<u32> {
         let mut buf = [0u8; 4];
-        self.peek_extract(&mut buf)?;
+        self.peek_exact(&mut buf)?;
         Ok(u32::from_be_bytes(buf))
     }
     fn peek_u64(&mut self) -> Result<u64> {
         let mut buf = [0u8; 8];
-        self.peek_extract(&mut buf)?;
+        self.peek_exact(&mut buf)?;
         Ok(u64::from_le_bytes(buf))
     }
     fn peek_u64_be(&mut self) -> Result<u64> {
         let mut buf = [0u8; 8];
-        self.peek_extract(&mut buf)?;
+        self.peek_exact(&mut buf)?;
         Ok(u64::from_be_bytes(buf))
     }
     fn peek_u128(&mut self) -> Result<u128> {
         let mut buf = [0u8; 16];
-        self.peek_extract(&mut buf)?;
+        self.peek_exact(&mut buf)?;
         Ok(u128::from_le_bytes(buf))
     }
     fn peek_u128_be(&mut self) -> Result<u128> {
         let mut buf = [0u8; 16];
-        self.peek_extract(&mut buf)?;
+        self.peek_exact(&mut buf)?;
         Ok(u128::from_be_bytes(buf))
     }
     fn peek_i8(&mut self) -> Result<i8> {
         let mut buf = [0u8; 1];
-        self.peek_extract(&mut buf)?;
+        self.peek_exact(&mut buf)?;
         Ok(i8::from_le_bytes(buf))
     }
     fn peek_i16(&mut self) -> Result<i16> {
         let mut buf = [0u8; 2];
-        self.peek_extract(&mut buf)?;
+        self.peek_exact(&mut buf)?;
         Ok(i16::from_le_bytes(buf))
     }
     fn peek_i16_be(&mut self) -> Result<i16> {
         let mut buf = [0u8; 2];
-        self.peek_extract(&mut buf)?;
+        self.peek_exact(&mut buf)?;
         Ok(i16::from_be_bytes(buf))
     }
     fn peek_i32(&mut self) -> Result<i32> {
         let mut buf = [0u8; 4];
-        self.peek_extract(&mut buf)?;
+        self.peek_exact(&mut buf)?;
         Ok(i32::from_le_bytes(buf))
     }
     fn peek_i32_be(&mut self) -> Result<i32> {
         let mut buf = [0u8; 4];
-        self.peek_extract(&mut buf)?;
+        self.peek_exact(&mut buf)?;
         Ok(i32::from_be_bytes(buf))
     }
     fn peek_i64(&mut self) -> Result<i64> {
         let mut buf = [0u8; 8];
-        self.peek_extract(&mut buf)?;
+        self.peek_exact(&mut buf)?;
         Ok(i64::from_le_bytes(buf))
     }
     fn peek_i64_be(&mut self) -> Result<i64> {
         let mut buf = [0u8; 8];
-        self.peek_extract(&mut buf)?;
+        self.peek_exact(&mut buf)?;
         Ok(i64::from_be_bytes(buf))
     }
     fn peek_i128(&mut self) -> Result<i128> {
         let mut buf = [0u8; 16];
-        self.peek_extract(&mut buf)?;
+        self.peek_exact(&mut buf)?;
         Ok(i128::from_le_bytes(buf))
     }
     fn peek_i128_be(&mut self) -> Result<i128> {
         let mut buf = [0u8; 16];
-        self.peek_extract(&mut buf)?;
+        self.peek_exact(&mut buf)?;
         Ok(i128::from_be_bytes(buf))
     }
     fn peek_u8_at(&mut self, offset: usize) -> Result<u8> {
         let mut buf = [0u8; 1];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(buf[0])
     }
     fn peek_u16_at(&mut self, offset: usize) -> Result<u16> {
         let mut buf = [0u8; 2];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(u16::from_le_bytes(buf))
     }
     fn peek_u16_be_at(&mut self, offset: usize) -> Result<u16> {
         let mut buf = [0u8; 2];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(u16::from_be_bytes(buf))
     }
     fn peek_u32_at(&mut self, offset: usize) -> Result<u32> {
         let mut buf = [0u8; 4];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(u32::from_le_bytes(buf))
     }
     fn peek_u32_be_at(&mut self, offset: usize) -> Result<u32> {
         let mut buf = [0u8; 4];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(u32::from_be_bytes(buf))
     }
     fn peek_u64_at(&mut self, offset: usize) -> Result<u64> {
         let mut buf = [0u8; 8];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(u64::from_le_bytes(buf))
     }
     fn peek_u64_be_at(&mut self, offset: usize) -> Result<u64> {
         let mut buf = [0u8; 8];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(u64::from_be_bytes(buf))
     }
     fn peek_u128_at(&mut self, offset: usize) -> Result<u128> {
         let mut buf = [0u8; 16];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(u128::from_le_bytes(buf))
     }
     fn peek_u128_be_at(&mut self, offset: usize) -> Result<u128> {
         let mut buf = [0u8; 16];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(u128::from_be_bytes(buf))
     }
     fn peek_i8_at(&mut self, offset: usize) -> Result<i8> {
         let mut buf = [0u8; 1];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(i8::from_le_bytes(buf))
     }
     fn peek_i16_at(&mut self, offset: usize) -> Result<i16> {
         let mut buf = [0u8; 2];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(i16::from_le_bytes(buf))
     }
     fn peek_i16_be_at(&mut self, offset: usize) -> Result<i16> {
         let mut buf = [0u8; 2];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(i16::from_be_bytes(buf))
     }
     fn peek_i32_at(&mut self, offset: usize) -> Result<i32> {
         let mut buf = [0u8; 4];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(i32::from_le_bytes(buf))
     }
     fn peek_i32_be_at(&mut self, offset: usize) -> Result<i32> {
         let mut buf = [0u8; 4];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(i32::from_be_bytes(buf))
     }
     fn peek_i64_at(&mut self, offset: usize) -> Result<i64> {
         let mut buf = [0u8; 8];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(i64::from_le_bytes(buf))
     }
     fn peek_i64_be_at(&mut self, offset: usize) -> Result<i64> {
         let mut buf = [0u8; 8];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(i64::from_be_bytes(buf))
     }
     fn peek_i128_at(&mut self, offset: usize) -> Result<i128> {
         let mut buf = [0u8; 16];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(i128::from_le_bytes(buf))
     }
     fn peek_i128_be_at(&mut self, offset: usize) -> Result<i128> {
         let mut buf = [0u8; 16];
-        self.peek_extract_at(offset, &mut buf)?;
+        self.peek_exact_at(offset, &mut buf)?;
         Ok(i128::from_be_bytes(buf))
     }
 
@@ -220,6 +220,29 @@ pub trait Peek {
         }
         Ok(vec)
     }
+
+    fn peek_and_equal(&mut self, data: &[u8]) -> Result<()> {
+        let mut buf = vec![0u8; data.len()];
+        self.peek_exact(&mut buf)?;
+        if buf != data {
+            return Err(std::io::Error::new(
+                std::io::ErrorKind::InvalidData,
+                "Data does not match",
+            ));
+        }
+        Ok(())
+    }
+    fn peek_and_equal_at(&mut self, offset: usize, data: &[u8]) -> Result<()> {
+        let mut buf = vec![0u8; data.len()];
+        self.peek_exact_at(offset, &mut buf)?;
+        if buf != data {
+            return Err(std::io::Error::new(
+                std::io::ErrorKind::InvalidData,
+                "Data does not match at offset",
+            ));
+        }
+        Ok(())
+    }
 }
 
 impl<T: Read + Seek> Peek for T {
@@ -230,7 +253,7 @@ impl<T: Read + Seek> Peek for T {
         Ok(bytes_read)
     }
 
-    fn peek_extract(&mut self, buf: &mut [u8]) -> Result<()> {
+    fn peek_exact(&mut self, buf: &mut [u8]) -> Result<()> {
         let current_pos = self.stream_position()?;
         self.read_exact(buf)?;
         self.seek(SeekFrom::Start(current_pos))?;
@@ -245,7 +268,7 @@ impl<T: Read + Seek> Peek for T {
         Ok(bytes_read)
     }
 
-    fn peek_extract_at(&mut self, offset: usize, buf: &mut [u8]) -> Result<()> {
+    fn peek_exact_at(&mut self, offset: usize, buf: &mut [u8]) -> Result<()> {
         let current_pos = self.stream_position()?;
         self.seek(SeekFrom::Start(offset as u64))?;
         self.read_exact(buf)?;
@@ -292,7 +315,7 @@ impl<T: Read + Seek> Peek for T {
 
 pub trait CPeek {
     fn cpeek(&self, buf: &mut [u8]) -> Result<usize>;
-    fn cpeek_extract(&self, buf: &mut [u8]) -> Result<()> {
+    fn cpeek_exact(&self, buf: &mut [u8]) -> Result<()> {
         let bytes_read = self.cpeek(buf)?;
         if bytes_read < buf.len() {
             return Err(std::io::Error::new(
@@ -303,7 +326,7 @@ pub trait CPeek {
         Ok(())
     }
     fn cpeek_at(&self, offset: usize, buf: &mut [u8]) -> Result<usize>;
-    fn cpeek_extract_at(&self, offset: usize, buf: &mut [u8]) -> Result<()> {
+    fn cpeek_exact_at(&self, offset: usize, buf: &mut [u8]) -> Result<()> {
         let bytes_read = self.cpeek_at(offset, buf)?;
         if bytes_read < buf.len() {
             return Err(std::io::Error::new(
@@ -321,190 +344,190 @@ pub trait CPeek {
         }
         Ok(buf)
     }
-    fn cpeek_extract_at_vec(&self, offset: usize, len: usize) -> Result<Vec<u8>> {
+    fn cpeek_exact_at_vec(&self, offset: usize, len: usize) -> Result<Vec<u8>> {
         let mut buf = vec![0u8; len];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(buf)
     }
 
     fn cpeek_u8(&self) -> Result<u8> {
         let mut buf = [0u8; 1];
-        self.cpeek_extract(&mut buf)?;
+        self.cpeek_exact(&mut buf)?;
         Ok(buf[0])
     }
     fn cpeek_u16(&self) -> Result<u16> {
         let mut buf = [0u8; 2];
-        self.cpeek_extract(&mut buf)?;
+        self.cpeek_exact(&mut buf)?;
         Ok(u16::from_le_bytes(buf))
     }
     fn cpeek_u16_be(&self) -> Result<u16> {
         let mut buf = [0u8; 2];
-        self.cpeek_extract(&mut buf)?;
+        self.cpeek_exact(&mut buf)?;
         Ok(u16::from_be_bytes(buf))
     }
     fn cpeek_u32(&self) -> Result<u32> {
         let mut buf = [0u8; 4];
-        self.cpeek_extract(&mut buf)?;
+        self.cpeek_exact(&mut buf)?;
         Ok(u32::from_le_bytes(buf))
     }
     fn cpeek_u32_be(&self) -> Result<u32> {
         let mut buf = [0u8; 4];
-        self.cpeek_extract(&mut buf)?;
+        self.cpeek_exact(&mut buf)?;
         Ok(u32::from_be_bytes(buf))
     }
     fn cpeek_u64(&self) -> Result<u64> {
         let mut buf = [0u8; 8];
-        self.cpeek_extract(&mut buf)?;
+        self.cpeek_exact(&mut buf)?;
         Ok(u64::from_le_bytes(buf))
     }
     fn cpeek_u64_be(&self) -> Result<u64> {
         let mut buf = [0u8; 8];
-        self.cpeek_extract(&mut buf)?;
+        self.cpeek_exact(&mut buf)?;
         Ok(u64::from_be_bytes(buf))
     }
     fn cpeek_u128(&self) -> Result<u128> {
         let mut buf = [0u8; 16];
-        self.cpeek_extract(&mut buf)?;
+        self.cpeek_exact(&mut buf)?;
         Ok(u128::from_le_bytes(buf))
     }
     fn cpeek_u128_be(&self) -> Result<u128> {
         let mut buf = [0u8; 16];
-        self.cpeek_extract(&mut buf)?;
+        self.cpeek_exact(&mut buf)?;
         Ok(u128::from_be_bytes(buf))
     }
     fn cpeek_i8(&self) -> Result<i8> {
         let mut buf = [0u8; 1];
-        self.cpeek_extract(&mut buf)?;
+        self.cpeek_exact(&mut buf)?;
         Ok(i8::from_le_bytes(buf))
     }
     fn cpeek_i16(&self) -> Result<i16> {
         let mut buf = [0u8; 2];
-        self.cpeek_extract(&mut buf)?;
+        self.cpeek_exact(&mut buf)?;
         Ok(i16::from_le_bytes(buf))
     }
     fn cpeek_i16_be(&self) -> Result<i16> {
         let mut buf = [0u8; 2];
-        self.cpeek_extract(&mut buf)?;
+        self.cpeek_exact(&mut buf)?;
         Ok(i16::from_be_bytes(buf))
     }
     fn cpeek_i32(&self) -> Result<i32> {
         let mut buf = [0u8; 4];
-        self.cpeek_extract(&mut buf)?;
+        self.cpeek_exact(&mut buf)?;
         Ok(i32::from_le_bytes(buf))
     }
     fn cpeek_i32_be(&self) -> Result<i32> {
         let mut buf = [0u8; 4];
-        self.cpeek_extract(&mut buf)?;
+        self.cpeek_exact(&mut buf)?;
         Ok(i32::from_be_bytes(buf))
     }
     fn cpeek_i64(&self) -> Result<i64> {
         let mut buf = [0u8; 8];
-        self.cpeek_extract(&mut buf)?;
+        self.cpeek_exact(&mut buf)?;
         Ok(i64::from_le_bytes(buf))
     }
     fn cpeek_i64_be(&self) -> Result<i64> {
         let mut buf = [0u8; 8];
-        self.cpeek_extract(&mut buf)?;
+        self.cpeek_exact(&mut buf)?;
         Ok(i64::from_be_bytes(buf))
     }
     fn cpeek_i128(&self) -> Result<i128> {
         let mut buf = [0u8; 16];
-        self.cpeek_extract(&mut buf)?;
+        self.cpeek_exact(&mut buf)?;
         Ok(i128::from_le_bytes(buf))
     }
     fn cpeek_i128_be(&self) -> Result<i128> {
         let mut buf = [0u8; 16];
-        self.cpeek_extract(&mut buf)?;
+        self.cpeek_exact(&mut buf)?;
         Ok(i128::from_be_bytes(buf))
     }
     fn cpeek_u8_at(&self, offset: usize) -> Result<u8> {
         let mut buf = [0u8; 1];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(buf[0])
     }
     fn cpeek_u16_at(&self, offset: usize) -> Result<u16> {
         let mut buf = [0u8; 2];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(u16::from_le_bytes(buf))
     }
     fn cpeek_u16_be_at(&self, offset: usize) -> Result<u16> {
         let mut buf = [0u8; 2];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(u16::from_be_bytes(buf))
     }
     fn cpeek_u32_at(&self, offset: usize) -> Result<u32> {
         let mut buf = [0u8; 4];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(u32::from_le_bytes(buf))
     }
     fn cpeek_u32_be_at(&self, offset: usize) -> Result<u32> {
         let mut buf = [0u8; 4];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(u32::from_be_bytes(buf))
     }
     fn cpeek_u64_at(&self, offset: usize) -> Result<u64> {
         let mut buf = [0u8; 8];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(u64::from_le_bytes(buf))
     }
     fn cpeek_u64_be_at(&self, offset: usize) -> Result<u64> {
         let mut buf = [0u8; 8];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(u64::from_be_bytes(buf))
     }
     fn cpeek_u128_at(&self, offset: usize) -> Result<u128> {
         let mut buf = [0u8; 16];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(u128::from_le_bytes(buf))
     }
     fn cpeek_u128_be_at(&self, offset: usize) -> Result<u128> {
         let mut buf = [0u8; 16];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(u128::from_be_bytes(buf))
     }
     fn cpeek_i8_at(&self, offset: usize) -> Result<i8> {
         let mut buf = [0u8; 1];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(i8::from_le_bytes(buf))
     }
     fn cpeek_i16_at(&self, offset: usize) -> Result<i16> {
         let mut buf = [0u8; 2];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(i16::from_le_bytes(buf))
     }
     fn cpeek_i16_be_at(&self, offset: usize) -> Result<i16> {
         let mut buf = [0u8; 2];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(i16::from_be_bytes(buf))
     }
     fn cpeek_i32_at(&self, offset: usize) -> Result<i32> {
         let mut buf = [0u8; 4];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(i32::from_le_bytes(buf))
     }
     fn cpeek_i32_be_at(&self, offset: usize) -> Result<i32> {
         let mut buf = [0u8; 4];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(i32::from_be_bytes(buf))
     }
     fn cpeek_i64_at(&self, offset: usize) -> Result<i64> {
         let mut buf = [0u8; 8];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(i64::from_le_bytes(buf))
     }
     fn cpeek_i64_be_at(&self, offset: usize) -> Result<i64> {
         let mut buf = [0u8; 8];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(i64::from_be_bytes(buf))
     }
     fn cpeek_i128_at(&self, offset: usize) -> Result<i128> {
         let mut buf = [0u8; 16];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(i128::from_le_bytes(buf))
     }
     fn cpeek_i128_be_at(&self, offset: usize) -> Result<i128> {
         let mut buf = [0u8; 16];
-        self.cpeek_extract_at(offset, &mut buf)?;
+        self.cpeek_exact_at(offset, &mut buf)?;
         Ok(i128::from_be_bytes(buf))
     }
 
@@ -518,6 +541,29 @@ pub trait CPeek {
         }
         CString::new(buf).map_err(|e| std::io::Error::new(std::io::ErrorKind::InvalidData, e))
     }
+
+    fn cpeek_and_equal(&self, data: &[u8]) -> Result<()> {
+        let mut buf = vec![0u8; data.len()];
+        self.cpeek_exact(&mut buf)?;
+        if buf != data {
+            return Err(std::io::Error::new(
+                std::io::ErrorKind::InvalidData,
+                "Data does not match",
+            ));
+        }
+        Ok(())
+    }
+    fn cpeek_and_equal_at(&self, offset: usize, data: &[u8]) -> Result<()> {
+        let mut buf = vec![0u8; data.len()];
+        self.cpeek_exact_at(offset, &mut buf)?;
+        if buf != data {
+            return Err(std::io::Error::new(
+                std::io::ErrorKind::InvalidData,
+                "Data does not match at offset",
+            ));
+        }
+        Ok(())
+    }
 }
 
 impl<T: Peek> CPeek for Mutex<T> {
@@ -560,6 +606,8 @@ pub trait ReadExt {
     fn read_fstring(&mut self, len: usize, encoding: Encoding, trim: bool) -> Result<String>;
 
     fn read_exact_vec(&mut self, len: usize) -> Result<Vec<u8>>;
+
+    fn read_and_equal(&mut self, data: &[u8]) -> Result<()>;
 }
 
 impl<T: Read> ReadExt for T {
@@ -685,6 +733,18 @@ impl<T: Read> ReadExt for T {
         self.read_exact(&mut buf)?;
         Ok(buf)
     }
+
+    fn read_and_equal(&mut self, data: &[u8]) -> Result<()> {
+        let mut buf = vec![0u8; data.len()];
+        self.read_exact(&mut buf)?;
+        if buf != data {
+            return Err(std::io::Error::new(
+                std::io::ErrorKind::InvalidData,
+                "Data does not match",
+            ));
+        }
+        Ok(())
+    }
 }
 
 pub trait WriteExt {
@@ -1047,6 +1107,9 @@ impl<'a> CPeek for MemReaderRef<'a> {
 
     fn cpeek_at(&self, offset: usize, buf: &mut [u8]) -> Result<usize> {
         let len = self.data.len();
+        if offset >= len {
+            return Ok(0);
+        }
         let bytes_to_read = std::cmp::min(buf.len(), len - offset);
         buf[..bytes_to_read].copy_from_slice(&self.data[offset..offset + bytes_to_read]);
         Ok(bytes_to_read)
diff --git a/src/scripts/bgi/image/img.rs b/src/scripts/bgi/image/img.rs
index df116b3..6c3e700 100644
--- a/src/scripts/bgi/image/img.rs
+++ b/src/scripts/bgi/image/img.rs
@@ -237,7 +237,7 @@ impl Script for BgiImage {
                 }
             }
         } else {
-            self.data.cpeek_extract_at(0x10, &mut data)?;
+            self.data.cpeek_exact_at(0x10, &mut data)?;
         }
         Ok(ImageData {
             width: self.width,
diff --git a/src/scripts/cat_system/archive/int.rs b/src/scripts/cat_system/archive/int.rs
index c62f060..522120b 100644
--- a/src/scripts/cat_system/archive/int.rs
+++ b/src/scripts/cat_system/archive/int.rs
@@ -138,9 +138,7 @@ impl<T: Read + Seek> Read for Entry<T> {
                 format!("Failed to lock mutex: {}", e),
             )
         })?;
-        reader.seek(SeekFrom::Start(
-            self.header.offset as u64 + self.pos as u64,
-        ))?;
+        reader.seek(SeekFrom::Start(self.header.offset as u64 + self.pos as u64))?;
         let bytes_read = buf.len().min(self.header.size as usize - self.pos);
         if bytes_read == 0 {
             return Ok(0);
@@ -302,15 +300,15 @@ impl<T: Read + Seek + std::fmt::Debug> CSIntArc<T> {
                 let current_offset = reader.stream_position()?;
                 let offset = reader.read_u32()?;
                 let size = reader.read_u32()?;
-                if offset as u64 <= current_offset || !((offset as u64) < file_size && size as u64 <= file_size && offset as u64 <= file_size as u64 - size as u64) {
+                if offset as u64 <= current_offset
+                    || !((offset as u64) < file_size
+                        && size as u64 <= file_size
+                        && offset as u64 <= file_size as u64 - size as u64)
+                {
                     entries.clear();
                     break;
                 }
-                let entry = CSIntFileHeader {
-                    name,
-                    offset,
-                    size,
-                };
+                let entry = CSIntFileHeader { name, offset, size };
                 entries.push(entry);
             }
             if !entries.is_empty() {
@@ -378,14 +376,12 @@ impl<T: Read + Seek + std::fmt::Debug + 'static> Script for CSIntArc<T> {
     }
 
     fn iter_archive<'a>(&'a mut self) -> Result<Box<dyn Iterator<Item = Result<String>> + 'a>> {
-        Ok(Box::new(
-            self.entries.iter().map(|e| Ok(e.name.clone())),
-        ))
+        Ok(Box::new(self.entries.iter().map(|e| Ok(e.name.clone()))))
     }
 
     fn iter_archive_mut<'a>(
-            &'a mut self,
-        ) -> Result<Box<dyn Iterator<Item = Result<Box<dyn ArchiveContent>>> + 'a>> {
+        &'a mut self,
+    ) -> Result<Box<dyn Iterator<Item = Result<Box<dyn ArchiveContent>>> + 'a>> {
         Ok(Box::new(CSIntArcIter {
             entries: self.entries.iter(),
             reader: self.reader.clone(),
@@ -423,10 +419,12 @@ impl<'a, T: Iterator<Item = &'a CSIntFileHeader>, R: Read + Seek + 'static> Iter
             entry.pos = 0;
             for i in 0..data.len() / 8 {
                 let j = i * 8;
-                let l = data[j] as u32 | (data[j + 1] as u32) << 8
+                let l = data[j] as u32
+                    | (data[j + 1] as u32) << 8
                     | (data[j + 2] as u32) << 16
                     | (data[j + 3] as u32) << 24;
-                let r = data[j + 4] as u32 | (data[j + 5] as u32) << 8
+                let r = data[j + 4] as u32
+                    | (data[j + 5] as u32) << 8
                     | (data[j + 6] as u32) << 16
                     | (data[j + 7] as u32) << 24;
                 let result = encrypt.decrypt([l, r]);
diff --git a/src/scripts/cat_system/image/hg3.rs b/src/scripts/cat_system/image/hg3.rs
new file mode 100644
index 0000000..fae8e23
--- /dev/null
+++ b/src/scripts/cat_system/image/hg3.rs
@@ -0,0 +1,309 @@
+use crate::ext::io::*;
+use crate::scripts::base::*;
+use crate::types::*;
+use crate::utils::bit_stream::*;
+use crate::utils::img::*;
+use crate::utils::struct_pack::*;
+use anyhow::Result;
+use flate2::{Decompress, FlushDecompress};
+use msg_tool_macro::*;
+use std::io::{Read, Seek, Write};
+
+#[derive(Debug)]
+pub struct Hg3ImageBuilder {}
+
+impl Hg3ImageBuilder {
+    pub const fn new() -> Self {
+        Hg3ImageBuilder {}
+    }
+}
+
+impl ScriptBuilder for Hg3ImageBuilder {
+    fn default_encoding(&self) -> Encoding {
+        Encoding::Cp932
+    }
+
+    fn build_script(
+        &self,
+        data: Vec<u8>,
+        _filename: &str,
+        _encoding: Encoding,
+        _archive_encoding: Encoding,
+        config: &ExtraConfig,
+    ) -> Result<Box<dyn Script>> {
+        Ok(Box::new(Hg3Image::new(data, config)?))
+    }
+
+    fn extensions(&self) -> &'static [&'static str] {
+        &["hg3"]
+    }
+
+    fn script_type(&self) -> &'static ScriptType {
+        &ScriptType::CatSystemHg3
+    }
+
+    fn is_this_format(&self, _filename: &str, buf: &[u8], buf_len: usize) -> Option<u8> {
+        if buf_len >= 4 && &buf[0..4] == b"HG-3" {
+            return Some(255);
+        }
+        None
+    }
+}
+
+#[derive(Debug, Clone, StructPack, StructUnpack)]
+struct Hg3Entry {
+    header_size: u32,
+    _unk: u32,
+    width: u32,
+    height: u32,
+    bpp: u32,
+    offset_x: u32,
+    offset_y: u32,
+    canvas_width: u32,
+    canvas_height: u32,
+}
+
+#[derive(Debug)]
+pub struct Hg3Image {
+    data: MemReader,
+    entries: Vec<(Hg3Entry, usize, usize)>,
+}
+
+impl Hg3Image {
+    pub fn new(buf: Vec<u8>, _config: &ExtraConfig) -> Result<Self> {
+        let mut reader = MemReader::new(buf);
+        let mut magic = [0u8; 4];
+        reader.read_exact(&mut magic)?;
+        if &magic != b"HG-3" {
+            return Err(anyhow::anyhow!("Invalid HG-3 image format"));
+        }
+        let mut offset = 0xC;
+        let mut entries = Vec::new();
+        let len = reader.data.len();
+        while offset + 0x14 < len && reader.cpeek_and_equal_at(offset + 8, b"stdinfo").is_ok() {
+            let mut section_size = reader.cpeek_u32_at(offset)?;
+            if section_size == 0 {
+                section_size = (len - offset as usize) as u32;
+            }
+            let stdinfo_size = reader.cpeek_u32_at(offset + 0x10)?;
+            if reader
+                .cpeek_and_equal_at(offset + 8 + stdinfo_size as usize, b"img")
+                .is_ok()
+            {
+                reader.pos = offset + 16;
+                let entry = Hg3Entry::unpack(&mut reader, false, Encoding::Cp932)?;
+                entries.push((entry, offset + 8, section_size as usize - 8));
+            }
+            offset += section_size as usize;
+        }
+        if entries.is_empty() {
+            return Err(anyhow::anyhow!("No valid entries found in HG-3 image"));
+        }
+        Ok(Hg3Image {
+            data: reader,
+            entries,
+        })
+    }
+}
+
+impl Script for Hg3Image {
+    fn default_output_script_type(&self) -> OutputScriptType {
+        OutputScriptType::Json
+    }
+
+    fn default_format_type(&self) -> FormatOptions {
+        FormatOptions::None
+    }
+
+    fn is_image(&self) -> bool {
+        true
+    }
+
+    fn export_image(&self) -> Result<ImageData> {
+        if self.entries.len() > 1 {
+            eprintln!(
+                "WARN: There are multiple entries in the HG-3 image, only the first one will be exported."
+            );
+            crate::COUNTER.inc_warning();
+        }
+        let (entry, offset, size) = &self.entries[0];
+        let data = &self.data.data[*offset..*offset + *size];
+        let reader = Hg3Reader {
+            m_input: MemReaderRef::new(data),
+            m_info: entry.clone(),
+            m_pixel_size: entry.bpp / 8,
+        };
+        Ok(reader.unpack()?)
+    }
+}
+
+pub struct Hg3Reader<'a> {
+    m_input: MemReaderRef<'a>,
+    m_info: Hg3Entry,
+    m_pixel_size: u32,
+}
+
+impl<'a> Hg3Reader<'a> {
+    pub fn unpack_stream(
+        &mut self,
+        data_offset: usize,
+        data_packed: usize,
+        data_unpacked: usize,
+        ctl_packed: usize,
+        ctl_unpacked: usize,
+    ) -> Result<Vec<u8>> {
+        let ctl_offset = data_offset + data_packed;
+        let mut data = Vec::with_capacity(data_unpacked);
+        data.resize(data_unpacked, 0);
+        let z = &self.m_input.data[data_offset..data_offset + data_packed];
+        let mut decompressor = Decompress::new(true);
+        decompressor.decompress(z, &mut data, FlushDecompress::Finish)?;
+        let z = &self.m_input.data[ctl_offset..ctl_offset + ctl_packed];
+        let mut ctl = Vec::with_capacity(ctl_unpacked);
+        ctl.resize(ctl_unpacked, 0);
+        let mut decompressor = Decompress::new(true);
+        decompressor.decompress(z, &mut ctl, FlushDecompress::Finish)?;
+        let mut bits = LsbBitStream::new(MemReaderRef::new(&ctl));
+        let mut copy = bits.get_next_bit()?;
+        let output_size = Self::get_bit_count(&mut bits)? as usize;
+        let mut output = Vec::with_capacity(output_size);
+        output.resize(output_size, 0);
+        let mut src = 0;
+        let mut dst = 0;
+        while dst < output_size {
+            let count = Self::get_bit_count(&mut bits)? as usize;
+            if copy {
+                output[dst..dst + count].copy_from_slice(&data[src..src + count]);
+                src += count;
+            }
+            dst += count;
+            copy = !copy;
+        }
+        Ok(self.apply_delta(&output))
+    }
+
+    fn get_bit_count(bits: &mut LsbBitStream<MemReaderRef<'_>>) -> Result<u32> {
+        let mut n = 0;
+        while !bits.get_next_bit()? {
+            n += 1;
+            if n >= 0x20 {
+                return Err(anyhow::anyhow!("Overflow at HG-3 Reader."));
+            }
+        }
+        let mut value = 1;
+        for _ in 0..n {
+            value = (value << 1) | (bits.get_next_bit()? as u32);
+        }
+        Ok(value)
+    }
+
+    fn convert_value(mut val: u8) -> u8 {
+        let carry = val & 1 != 0;
+        val >>= 1;
+        if carry { val ^ 0xff } else { val }
+    }
+
+    fn apply_delta(&self, pixels: &[u8]) -> Vec<u8> {
+        let mut table = [[0u32; 0x100]; 4];
+        for i in 0..0x100u32 {
+            let mut val = i & 0xC0;
+            val <<= 6;
+            val |= i & 0x30;
+            val <<= 6;
+            val |= i & 0x0C;
+            val <<= 6;
+            val |= i & 0x03;
+            table[0][i as usize] = val << 6;
+            table[1][i as usize] = val << 4;
+            table[2][i as usize] = val << 2;
+            table[3][i as usize] = val;
+        }
+        let pxl_len = pixels.len();
+        let plane_size = pxl_len / 4;
+        let mut plane0 = 0;
+        let mut plane1 = plane0 + plane_size;
+        let mut plane2 = plane1 + plane_size;
+        let mut plane3 = plane2 + plane_size;
+        let mut output = Vec::with_capacity(pxl_len);
+        output.resize(pxl_len, 0);
+        let mut dst = 0;
+        while dst < pxl_len {
+            let val = table[0][pixels[plane0] as usize]
+                | table[1][pixels[plane1] as usize]
+                | table[2][pixels[plane2] as usize]
+                | table[3][pixels[plane3] as usize];
+            plane0 += 1;
+            plane1 += 1;
+            plane2 += 1;
+            plane3 += 1;
+            output[dst] = Self::convert_value(val as u8);
+            dst += 1;
+            output[dst] = Self::convert_value((val >> 8) as u8);
+            dst += 1;
+            output[dst] = Self::convert_value((val >> 16) as u8);
+            dst += 1;
+            output[dst] = Self::convert_value((val >> 24) as u8);
+            dst += 1;
+        }
+        let stride = self.m_info.width * self.m_pixel_size;
+        for x in self.m_pixel_size..stride {
+            output[x as usize] =
+                output[x as usize].wrapping_add(output[x as usize - self.m_pixel_size as usize]);
+        }
+        let mut prev = 0;
+        for _ in 1..self.m_info.height {
+            let line = prev + stride;
+            for x in 0..stride {
+                output[line as usize + x as usize] = output[line as usize + x as usize]
+                    .wrapping_add(output[prev as usize + x as usize]);
+            }
+            prev = line;
+        }
+        output
+    }
+
+    fn unpack(mut self) -> Result<ImageData> {
+        self.m_input.pos = self.m_info.header_size as usize;
+        let mut image_type = [0; 8];
+        self.m_input.read_exact(&mut image_type)?;
+        if &image_type == b"img0000\0" {
+            return self.unpack_img0000();
+        } else {
+            return Err(anyhow::anyhow!("Unsupported image type: {:?}", image_type));
+        }
+    }
+
+    fn unpack_img0000(&mut self) -> Result<ImageData> {
+        self.m_input.pos = self.m_info.header_size as usize + 0x18;
+        let packed_data_size = self.m_input.read_u32()?;
+        let data_size = self.m_input.read_u32()?;
+        let ctl_packed_size = self.m_input.read_u32()?;
+        let ctl_size = self.m_input.read_u32()?;
+        let data = self.unpack_stream(
+            self.m_info.header_size as usize + 0x28,
+            packed_data_size as usize,
+            data_size as usize,
+            ctl_packed_size as usize,
+            ctl_size as usize,
+        )?;
+        let fmt = match self.m_info.bpp {
+            24 => ImageColorType::Bgr,
+            32 => ImageColorType::Bgra,
+            _ => {
+                return Err(anyhow::anyhow!(
+                    "Unsupported BPP: {} in HG-3 image",
+                    self.m_info.bpp
+                ));
+            }
+        };
+        let mut img = ImageData {
+            width: self.m_info.width,
+            height: self.m_info.height,
+            color_type: fmt,
+            depth: 8,
+            data,
+        };
+        flip_image(&mut img)?;
+        Ok(img)
+    }
+}
diff --git a/src/scripts/cat_system/image/mod.rs b/src/scripts/cat_system/image/mod.rs
new file mode 100644
index 0000000..8ec74ac
--- /dev/null
+++ b/src/scripts/cat_system/image/mod.rs
@@ -0,0 +1 @@
+pub mod hg3;
diff --git a/src/scripts/cat_system/mod.rs b/src/scripts/cat_system/mod.rs
index d8aa5b7..07da0b8 100644
--- a/src/scripts/cat_system/mod.rs
+++ b/src/scripts/cat_system/mod.rs
@@ -1,2 +1,4 @@
 #[cfg(feature = "cat-system-arc")]
 pub mod archive;
+#[cfg(feature = "cat-system-img")]
+pub mod image;
diff --git a/src/scripts/mod.rs b/src/scripts/mod.rs
index 5e41391..def004d 100644
--- a/src/scripts/mod.rs
+++ b/src/scripts/mod.rs
@@ -44,6 +44,8 @@ lazy_static::lazy_static! {
         Box::new(yaneurao::itufuru::archive::ItufuruArchiveBuilder::new()),
         #[cfg(feature = "cat-system-arc")]
         Box::new(cat_system::archive::int::CSIntArcBuilder::new()),
+        #[cfg(feature = "cat-system-img")]
+        Box::new(cat_system::image::hg3::Hg3ImageBuilder::new()),
     ];
     pub static ref ALL_EXTS: Vec<String> =
         BUILDER.iter().flat_map(|b| b.extensions()).map(|s| s.to_string()).collect();
diff --git a/src/scripts/yaneurao/itufuru/archive.rs b/src/scripts/yaneurao/itufuru/archive.rs
index 1268140..1752cdf 100644
--- a/src/scripts/yaneurao/itufuru/archive.rs
+++ b/src/scripts/yaneurao/itufuru/archive.rs
@@ -254,7 +254,7 @@ impl<'a, T: Iterator<Item = &'a CustomHeader>, R: Read + Seek> Iterator
     fn next(&mut self) -> Option<Self::Item> {
         if let Some(entry) = self.entries.next() {
             let file_offset = entry.offset as usize;
-            match self.reader.peek_extract_at_vec(
+            match self.reader.peek_exact_at_vec(
                 file_offset + self.first_file_offset as usize,
                 entry.size as usize,
             ) {
diff --git a/src/types.rs b/src/types.rs
index fd49dc5..9a035fe 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -245,6 +245,9 @@ pub enum ScriptType {
     #[cfg(feature = "cat-system-arc")]
     /// CatSystem2 engine archive
     CatSystemInt,
+    #[cfg(feature = "cat-system-img")]
+    /// CatSystem2 engine image
+    CatSystemHg3,
     #[cfg(feature = "circus")]
     /// Circus MES script
     Circus,
diff --git a/src/utils/bit_stream.rs b/src/utils/bit_stream.rs
index ae015a1..98c360c 100644
--- a/src/utils/bit_stream.rs
+++ b/src/utils/bit_stream.rs
@@ -85,3 +85,51 @@ impl<'a, T: Write> MsbBitWriter<'a, T> {
         Ok(())
     }
 }
+
+pub struct LsbBitStream<T: Read> {
+    pub m_input: T,
+    m_bits: u32,
+    pub m_cached_bits: u32,
+}
+
+impl<T: Read> LsbBitStream<T> {
+    pub fn new(input: T) -> Self {
+        LsbBitStream {
+            m_input: input,
+            m_bits: 0,
+            m_cached_bits: 0,
+        }
+    }
+
+    pub fn get_bits(&mut self, mut count: u32) -> Result<u32> {
+        if self.m_cached_bits >= count {
+            let mask = (1 << count) - 1;
+            let value = self.m_bits & mask;
+            self.m_bits >>= count;
+            self.m_cached_bits -= count;
+            Ok(value)
+        } else {
+            let mut value = self.m_bits & ((1 << self.m_cached_bits) - 1);
+            count -= self.m_cached_bits;
+            let mut shift = self.m_cached_bits;
+            self.m_cached_bits = 0;
+            while count >= 8 {
+                let b = self.m_input.read_u8()?;
+                value |= (b as u32) << shift;
+                shift += 8;
+                count -= 8;
+            }
+            if count > 0 {
+                let b = self.m_input.read_u8()?;
+                value |= ((b as u32) & ((1 << count) - 1)) << shift;
+                self.m_bits = b as u32 >> count;
+                self.m_cached_bits = 8 - count;
+            }
+            Ok(value)
+        }
+    }
+
+    pub fn get_next_bit(&mut self) -> Result<bool> {
+        Ok(self.get_bits(1)? == 1)
+    }
+}
diff --git a/src/utils/img.rs b/src/utils/img.rs
index 20795a9..f2326d6 100644
--- a/src/utils/img.rs
+++ b/src/utils/img.rs
@@ -160,3 +160,26 @@ pub fn decode_img(typ: ImageOutputType, filename: &str) -> Result<ImageData> {
         }
     }
 }
+
+pub fn flip_image(data: &mut ImageData) -> Result<()> {
+    if data.height <= 1 {
+        return Ok(());
+    }
+    let row_size = data.data.len() / data.height as usize;
+    if row_size == 0 {
+        return Ok(());
+    }
+
+    let mut i = 0;
+    let mut j = data.height as usize - 1;
+    while i < j {
+        let (top, bottom) = data.data.split_at_mut(j * row_size);
+        let top_row = &mut top[i * row_size..i * row_size + row_size];
+        let bottom_row = &mut bottom[0..row_size];
+        top_row.swap_with_slice(bottom_row);
+        i += 1;
+        j -= 1;
+    }
+
+    Ok(())
+}