diff --git a/ArcFormats/KiriKiri/ArcXP3.cs b/ArcFormats/KiriKiri/ArcXP3.cs
index 373278c4..b4a4e0cd 100644
--- a/ArcFormats/KiriKiri/ArcXP3.cs
+++ b/ArcFormats/KiriKiri/ArcXP3.cs
@@ -152,7 +152,9 @@ namespace GameRes.Formats.KiriKiri
                     if (entry_size < 0)
                         return null;
                     dir_offset += 12 + entry_size;
-                    if (0x6E666E68 == entry_signature || 0x46696C65 == entry_signature) // "hnfn" || "eliF"
+                    if (0x6E666E68 == entry_signature       // "hnfn"
+                        || 0x6C696D73 == entry_signature    // "smil"
+                        || 0x46696C65 == entry_signature)   // "eliF"
                     {
                         uint hash = header.ReadUInt32();
                         int name_size = header.ReadInt16();
diff --git a/ArcFormats/KiriKiri/CryptAlgorithms.cs b/ArcFormats/KiriKiri/CryptAlgorithms.cs
index a9ed3e55..07935775 100644
--- a/ArcFormats/KiriKiri/CryptAlgorithms.cs
+++ b/ArcFormats/KiriKiri/CryptAlgorithms.cs
@@ -822,4 +822,31 @@ namespace GameRes.Formats.KiriKiri
             Decrypt (entry, offset, values, pos, count);
         }
     }
+
+    [Serializable]
+    public class SmileCrypt : ICrypt
+    {
+        public override void Decrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
+        {
+            uint hash = entry.Hash ^ 0xD0F0BA7B;
+            byte key = (byte)(hash ^ (hash >> 8) ^ (hash >> 16) ^ (hash >> 24));
+            if (0 == key)
+                key = 0x5E;
+            if (0 == offset && count > 0)
+            {
+                if (0 == (hash & 0xFF))
+                    hash = 0x7B;
+                values[pos] ^= (byte)hash;
+            }
+            for (int i = 0; i < count; ++i)
+            {
+                values[pos+i] ^= key;
+            }
+        }
+
+        public override void Encrypt (Xp3Entry entry, long offset, byte[] values, int pos, int count)
+        {
+            Decrypt (entry, offset, values, pos, count);
+        }
+    }
 }