diff --git a/ArcFormats/Properties/AssemblyInfo.cs b/ArcFormats/Properties/AssemblyInfo.cs
index d01fe814..0b880131 100644
--- a/ArcFormats/Properties/AssemblyInfo.cs
+++ b/ArcFormats/Properties/AssemblyInfo.cs
@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion ("1.1.9.401")]
-[assembly: AssemblyFileVersion ("1.1.9.401")]
+[assembly: AssemblyVersion ("1.1.9.406")]
+[assembly: AssemblyFileVersion ("1.1.9.406")]
diff --git a/ArcFormats/Yuka/ArcYKC.cs b/ArcFormats/Yuka/ArcYKC.cs
index 4f460454..8fae5c1c 100644
--- a/ArcFormats/Yuka/ArcYKC.cs
+++ b/ArcFormats/Yuka/ArcYKC.cs
@@ -48,6 +48,11 @@ namespace GameRes.Formats.Yuka
         public override bool  IsHierarchic { get { return true; } }
         public override bool     CanCreate { get { return true; } }
 
+        public YkcOpener ()
+        {
+            Extensions = new string[] { "ykc", "dat" };
+        }
+
         public override ArcFile TryOpen (ArcView file)
         {
             if (0x3130 != file.View.ReadUInt32 (4))
@@ -82,6 +87,23 @@ namespace GameRes.Formats.Yuka
             return new ArcFile (file, this, dir);
         }
 
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            if (entry.Size < 0x24
+                || !entry.Name.EndsWith (".yks", StringComparison.InvariantCultureIgnoreCase)
+                || !arc.File.View.AsciiEqual (entry.Offset, "YKS001")
+                || 1 != arc.File.View.ReadUInt16 (entry.Offset+6))
+                return arc.File.CreateStream (entry.Offset, entry.Size);
+            // decrypt script contents
+            var data = new byte[entry.Size];
+            arc.File.View.Read (entry.Offset, data, 0, entry.Size);
+            uint text_offset = LittleEndian.ToUInt32 (data, 0x20);
+            for (uint i = text_offset; i < data.Length; ++i)
+                data[i] ^= 0xAA;
+            data[6] = 0;
+            return new MemoryStream (data);
+        }
+
         public override void Create (Stream output, IEnumerable<Entry> list, ResourceOptions options,
                                      EntryCallback callback)
         {
diff --git a/supported.html b/supported.html
index dbbc97a2..bbb747eb 100644
--- a/supported.html
+++ b/supported.html
@@ -345,6 +345,7 @@ Kikouyoku Senki Gin no Toki no Corona<br/>
 <tr><td>*.wag<br/>*.4ag</td><td><tt>WAG@</tt><br/><tt>GAF4</tt></td><td>No</td></tr>
 <tr class="odd"><td>*.ykc</td><td><tt>YKC001</tt></td><td>Yes</td><td rowspan="2">Yuka</td><td rowspan="2">
 SuGirly Wish<br/>
+_summer<br/>
 </td></tr>
 <tr class="odd"><td>*.ykg</td><td><tt>YKG000</tt></td><td>No</td></tr>
 <tr><td>*.pak</td><td><tt>GCEX</tt></td><td>No</td><td rowspan="2">G2</td><td rowspan="2">