diff --git a/msg_tool_xp3data/crypt.json b/msg_tool_xp3data/crypt.json
index 97e8d4e..d8c3c6e 100644
--- a/msg_tool_xp3data/crypt.json
+++ b/msg_tool_xp3data/crypt.json
@@ -1554,7 +1554,8 @@
             },
             {
                 "Key": "kHMdDweFjeDFVTwQA10XQAPUAOfXzKp2ukygeLzGzHg=",
-                "Nonce": "CSBjzSXQNTioPhDp710WCQ=="
+                "Nonce": "CSBjzSXQNTioPhDp710WCQ==",
+                "FilterKey": 13089994567570788352
             }
         ],
         "FilterKey": 8093658935271803197,
@@ -1668,6 +1669,33 @@
         "$type": "HashCrypt",
         "Title": "愛娘は、マゾ性隷 ～娘だからって遠慮しないでね？～"
     },
+    "Mashiro-iro Symphony": {
+        "$type": "HxCrypt",
+        "Mask": 284,
+        "Offset": 389,
+        "PrologOrder": "AQIA",
+        "OddBranchOrder": "BQABBAID",
+        "EvenBranchOrder": "AQYFAAcCBAM=",
+        "IndexKey1": {
+            "Key": "pWVnGBsl5MFeR3EH2yJwHx2ZvHkWDxQhIhODqqdxMMo=",
+            "Nonce": "JClYlfgFkP8dN6oa3iOrAw=="
+        },
+        "IndexKey2": [
+            {
+                "Key": "q0lPvHOK7Qa4OM615uOvyTInTJf8aYpS/jcpM1uNnuo=",
+                "Nonce": "1KoS7cnIicdp1hZ0bjlduw=="
+            },
+            {
+                "Key": "kUUY3z8D94i85yssB5xRBZmSiKRNABPPAl88Qtf7Ix0=",
+                "Nonce": "+Hg91OLLC9E4ET7YbHMHsA==",
+                "FilterKey": 14361241883570560968
+            }
+        ],
+        "FilterKey": 1449527129867772322,
+        "RandomType": 1,
+        "ControlBlockName": "mashiro.bin",
+        "Title": "Mashiro-iro Symphony -Love is pure white- Remake for FHD | Mashiro-iro Symphony: Sana Edition | ましろ色シンフォニー -Love is pure white- Remake for FHD | 纯白交响曲 -Love is pure white- HD Remake | 純白交響曲 -Love is pure white- HD Remake | ましろ色シンフォニー SANA EDITION | 纯白交响曲 SANA EDITION | 純白交響曲 SANA EDITION"
+    },
     "Me ga Sametara Seieki ga 100 Bai...": {
         "$type": "DieselmineCrypt",
         "Title": "目が覚めたら精液が100倍溜まる身体になってた→大量注入！"
diff --git a/msg_tool_xp3data/cx_cb/mashiro.bin b/msg_tool_xp3data/cx_cb/mashiro.bin
new file mode 100644
index 0000000..43ddb72
Binary files /dev/null and b/msg_tool_xp3data/cx_cb/mashiro.bin differ
diff --git a/src/scripts/kirikiri/archive/xp3/crypt/cx.rs b/src/scripts/kirikiri/archive/xp3/crypt/cx.rs
index bf2bcf2..b50e2cc 100644
--- a/src/scripts/kirikiri/archive/xp3/crypt/cx.rs
+++ b/src/scripts/kirikiri/archive/xp3/crypt/cx.rs
@@ -1,4 +1,5 @@
 use super::*;
+use crate::ext::atomic::AtomicQuick;
 use crate::ext::mutex::MutexExt;
 use crate::utils::files::*;
 use crate::utils::struct_pack::*;
@@ -8,6 +9,7 @@ use serde::{Deserializer, de};
 use std::collections::HashSet;
 use std::ops::{Deref, DerefMut, Index};
 use std::path::PathBuf;
+use std::sync::atomic::AtomicU64;
 use std::sync::{Mutex, Weak};
 
 const S_CTL_BLOCK_SIGNATURE: &[u8] = b" Encryption control block";
@@ -2032,7 +2034,7 @@ pub struct HxCrypt {
     base: CxEncryption,
     key1: IndexKey,
     key2: IndexKeys,
-    filter_key: u64,
+    filter_key: AtomicU64,
     file_mapping: HashMap<FileHash, String>,
     path_mapping: HashMap<PathHash, String>,
     info_map: Mutex<HashMap<String, HxEntry>>,
@@ -2042,6 +2044,7 @@ pub struct HxCrypt {
 pub struct IndexKey {
     key: [u8; 32],
     nonce: [u8; 16],
+    filter_key: Option<u64>,
 }
 
 impl std::fmt::Debug for IndexKey {
@@ -2049,6 +2052,7 @@ impl std::fmt::Debug for IndexKey {
         f.debug_struct("IndexKey")
             .field("key", &hex::encode(&self.key))
             .field("nonce", &hex::encode(&self.nonce))
+            .field("filter_key", &self.filter_key)
             .finish()
     }
 }
@@ -2058,6 +2062,8 @@ impl std::fmt::Debug for IndexKey {
 struct IndexKeyTmp {
     key: String,
     nonce: String,
+    #[serde(default)]
+    filter_key: Option<u64>,
 }
 
 impl<'de> Deserialize<'de> for IndexKey {
@@ -2081,7 +2087,11 @@ impl<'de> Deserialize<'de> for IndexKey {
                 bytes.len()
             ))
         })?;
-        Ok(Self { key, nonce })
+        Ok(Self {
+            key,
+            nonce,
+            filter_key: s.filter_key,
+        })
     }
 }
 
@@ -2168,7 +2178,7 @@ impl HxCrypt {
             )?,
             key1: index_key1.clone(),
             key2: index_key2.clone(),
-            filter_key,
+            filter_key: AtomicU64::new(filter_key),
             file_mapping: file_map,
             path_mapping: path_map,
             info_map: Mutex::new(HashMap::new()),
@@ -2262,6 +2272,9 @@ impl HxCrypt {
             1 => &self.key1,
             _ => anyhow::bail!("Unknown hxv4 flags: {}", flags),
         };
+        if let Some(filter_key) = &key.filter_key {
+            self.filter_key.qsave(*filter_key);
+        }
         let mut nonce = [0; 8];
         nonce.copy_from_slice(&key.nonce[..8]);
         let mut crypt = ChaCha20Legacy::new((&key.key).into(), (&nonce).into());
@@ -2494,7 +2507,7 @@ impl Crypt for HxCrypt {
             .ok_or_else(|| anyhow::anyhow!("extra info is not hx entry."))?;
         let mut entry_key = info.key;
         if (info.id & 0x100000000) == 0 {
-            entry_key ^= self.filter_key;
+            entry_key ^= self.filter_key.qload();
         }
         let header_key = !entry_key;
         let key = self.create_filter_key(entry_key, header_key)?;
@@ -2521,7 +2534,7 @@ impl Crypt for HxCrypt {
             .ok_or_else(|| anyhow::anyhow!("extra info is not hx entry."))?;
         let mut entry_key = info.key;
         if (info.id & 0x100000000) == 0 {
-            entry_key ^= self.filter_key;
+            entry_key ^= self.filter_key.qload();
         }
         let header_key = !entry_key;
         let key = self.create_filter_key(entry_key, header_key)?;