diff --git a/README.md b/README.md
index 5f2390d..a741bcd 100644
--- a/README.md
+++ b/README.md
@@ -267,3 +267,4 @@ msg-tool create -t <script-type> <input> <output>
 | Script Type | Feature Name | Name | Export | Import | Export Multiple | Import Multiple | Custom Export | Custom Import | Create | Remarks |
 |---|---|---|---|---|---|---|---|---|---|---|
 | `yuris-yscm` | `yuris` | Yu-Ris YSCM(opcodes metadata) file (.ybn) | ❌ | ❌ | ❌ | ❌ | ✔️ | ❌ | ❌ | |
+| `yuris-yser` | `yuris` | Yu-Ris YSER(error message) file (.ybn) | ❌ | ❌ | ❌ | ❌ | ✔️ | ❌ | ❌ | | 
diff --git a/src/scripts/mod.rs b/src/scripts/mod.rs
index bbb8fca..4803c4d 100644
--- a/src/scripts/mod.rs
+++ b/src/scripts/mod.rs
@@ -178,6 +178,8 @@ lazy_static::lazy_static! {
         Box::new(qlie::image::abmp10::Abmp10ImageBuilder::new()),
         #[cfg(feature = "yuris")]
         Box::new(yuris::yscm::YSCMBuilder::new()),
+        #[cfg(feature = "yuris")]
+        Box::new(yuris::yser::YSERBuilder::new()),
     ];
     /// A list of all script extensions.
     pub static ref ALL_EXTS: Vec<String> =
diff --git a/src/scripts/yuris/mod.rs b/src/scripts/yuris/mod.rs
index b16b9e9..c582208 100644
--- a/src/scripts/yuris/mod.rs
+++ b/src/scripts/yuris/mod.rs
@@ -1,3 +1,4 @@
 //! Yu-Ris Engine Scripts
 mod types;
 pub mod yscm;
+pub mod yser;
diff --git a/src/scripts/yuris/yser.rs b/src/scripts/yuris/yser.rs
new file mode 100644
index 0000000..a0487f0
--- /dev/null
+++ b/src/scripts/yuris/yser.rs
@@ -0,0 +1,125 @@
+//! Yu-Ris YSER files
+use crate::ext::io::*;
+use crate::scripts::base::*;
+use crate::types::*;
+use crate::utils::encoding::*;
+use crate::utils::struct_pack::*;
+use anyhow::Result;
+use msg_tool_macro::*;
+use serde::{Deserialize, Serialize};
+use std::io::{Read, Seek, Write};
+
+#[derive(Debug)]
+pub struct YSERBuilder {}
+
+impl YSERBuilder {
+    /// Creates a new instance of `YSERBuilder`
+    pub const fn new() -> Self {
+        YSERBuilder {}
+    }
+}
+
+impl ScriptBuilder for YSERBuilder {
+    fn default_encoding(&self) -> Encoding {
+        Encoding::Cp932
+    }
+
+    fn build_script(
+        &self,
+        buf: Vec<u8>,
+        _filename: &str,
+        encoding: Encoding,
+        _archive_encoding: Encoding,
+        config: &ExtraConfig,
+        _archive: Option<&Box<dyn Script>>,
+    ) -> Result<Box<dyn Script + Send + Sync>> {
+        Ok(Box::new(YSER::new(MemReader::new(buf), encoding, config)?))
+    }
+
+    fn extensions(&self) -> &'static [&'static str] {
+        &["ybn"]
+    }
+
+    fn is_this_format(&self, _filename: &str, buf: &[u8], buf_len: usize) -> Option<u8> {
+        if buf_len >= 4 && buf.starts_with(b"YSER") {
+            return Some(20);
+        }
+        None
+    }
+
+    fn script_type(&self) -> &'static ScriptType {
+        &ScriptType::YurisYSER
+    }
+}
+
+#[derive(Debug, StructPack, StructUnpack, Deserialize, Serialize)]
+struct StringData {
+    unk: u32,
+    #[cstring]
+    s: String,
+}
+
+#[derive(Debug, StructPack, StructUnpack, Deserialize, Serialize)]
+struct YSERData {
+    engine: u32,
+    #[pvec(u64)]
+    strings: Vec<StringData>,
+}
+
+#[derive(Debug)]
+pub struct YSER {
+    data: YSERData,
+    custom_yaml: bool,
+}
+
+impl YSER {
+    pub fn new<T: Read + Seek>(
+        mut reader: T,
+        encoding: Encoding,
+        config: &ExtraConfig,
+    ) -> Result<Self> {
+        let mut sig = [0; 4];
+        reader.read_exact(&mut sig)?;
+        if &sig != b"YSER" {
+            anyhow::bail!("Unsupported YSER file.");
+        }
+        let data = YSERData::unpack(&mut reader, false, encoding, &None)?;
+        Ok(Self {
+            data,
+            custom_yaml: config.custom_yaml,
+        })
+    }
+}
+
+impl Script for YSER {
+    fn default_output_script_type(&self) -> OutputScriptType {
+        OutputScriptType::Custom
+    }
+
+    fn is_output_supported(&self, output: OutputScriptType) -> bool {
+        matches!(output, OutputScriptType::Custom)
+    }
+
+    fn default_format_type(&self) -> FormatOptions {
+        FormatOptions::None
+    }
+
+    fn custom_output_extension(&self) -> &'static str {
+        if self.custom_yaml { "yaml" } else { "json" }
+    }
+
+    fn custom_export(&self, filename: &std::path::Path, encoding: Encoding) -> Result<()> {
+        let s = if self.custom_yaml {
+            serde_yaml_ng::to_string(&self.data)
+                .map_err(|e| anyhow::anyhow!("Failed to serialize to YAML: {}", e))?
+        } else {
+            serde_json::to_string_pretty(&self.data)
+                .map_err(|e| anyhow::anyhow!("Failed to serialize to JSON: {}", e))?
+        };
+        let mut writer = crate::utils::files::write_file(filename)?;
+        let s = encode_string(encoding, &s, false)?;
+        writer.write_all(&s)?;
+        writer.flush()?;
+        Ok(())
+    }
+}
diff --git a/src/types.rs b/src/types.rs
index 7a2dbaa..0093f90 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -911,6 +911,9 @@ pub enum ScriptType {
     #[cfg(feature = "yuris")]
     /// Yu-Ris YSCM(opcodes metadata) file (.ybn)
     YurisYSCM,
+    #[cfg(feature = "yuris")]
+    /// Yu-Ris YSER(error message) file (.ybn)
+    YurisYSER,
 }
 
 #[derive(Clone, Debug, Serialize, Deserialize)]