diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index 95207d12..b5869108 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -72,6 +72,7 @@
       <DependentUpon>WidgetMCG.xaml</DependentUpon>
     </Compile>
     <Compile Include="ImagePSD.cs" />
+    <Compile Include="Kaguya\ImageAO.cs" />
     <Compile Include="Propeller\ArcMGR.cs" />
     <Compile Include="Propeller\ArcMPK.cs" />
     <Compile Include="Propeller\ImageMGR.cs" />
diff --git a/ArcFormats/Kaguya/ImageAO.cs b/ArcFormats/Kaguya/ImageAO.cs
new file mode 100644
index 00000000..637061ba
--- /dev/null
+++ b/ArcFormats/Kaguya/ImageAO.cs
@@ -0,0 +1,88 @@
+//! \file       ImageAO.cs
+//! \date       Tue Nov 24 15:42:43 2015
+//! \brief      KaGuYa script engine image format.
+//
+// Copyright (C) 2015 by morkt
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//
+
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Text;
+using System.Windows;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+
+namespace GameRes.Formats.Kaguya
+{
+    [Export(typeof(ImageFormat))]
+    public class AoFormat : ApFormat
+    {
+        public override string         Tag { get { return "AO/KAGUYA"; } }
+        public override string Description { get { return "KaGuYa script engine image format"; } }
+        public override uint     Signature { get { return 0; } }
+
+        public AoFormat ()
+        {
+            Extensions = new string[] { "sp_" };
+        }
+
+        public override ImageMetaData ReadMetaData (Stream stream)
+        {
+            int A = stream.ReadByte();
+            int O = stream.ReadByte();
+            if ('A' != A || 'O' != O)
+                return null;
+            using (var file = new ArcView.Reader (stream))
+            {
+                var info = new ImageMetaData();
+                info.Width = file.ReadUInt32();
+                info.Height = file.ReadUInt32();
+                info.BPP = file.ReadInt16();
+                info.OffsetX = file.ReadInt32();
+                info.OffsetY = file.ReadInt32();
+                if (info.Width > 0x8000 || info.Height > 0x8000 || !(32 == info.BPP || 24 == info.BPP))
+                    return null;
+                return info;
+            }
+        }
+
+        public override ImageData Read (Stream stream, ImageMetaData info)
+        {
+            stream.Position = 0x14;
+            return ReadBitmapData (stream, info);
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            using (var output = new BinaryWriter (file, Encoding.ASCII, true))
+            {
+                output.Write ((byte)'A');
+                output.Write ((byte)'O');
+                output.Write (image.Width);
+                output.Write (image.Height);
+                output.Write ((short)24);
+                output.Write (image.OffsetX);
+                output.Write (image.OffsetY);
+                WriteBitmapData (file, image);
+            }
+        }
+    }
+}
diff --git a/ArcFormats/Kaguya/ImageAP.cs b/ArcFormats/Kaguya/ImageAP.cs
index 897a7f17..736f55c8 100644
--- a/ArcFormats/Kaguya/ImageAP.cs
+++ b/ArcFormats/Kaguya/ImageAP.cs
@@ -29,7 +29,6 @@ using System.Text;
 using System.Windows;
 using System.Windows.Media;
 using System.Windows.Media.Imaging;
-using GameRes.Utility;
 
 namespace GameRes.Formats.Kaguya
 {
@@ -66,6 +65,11 @@ namespace GameRes.Formats.Kaguya
         public override ImageData Read (Stream stream, ImageMetaData info)
         {
             stream.Position = 12;
+            return ReadBitmapData (stream, info);
+        }
+
+        protected ImageData ReadBitmapData (Stream stream, ImageMetaData info)
+        {
             int stride = (int)info.Width*4;
             var pixels = new byte[stride*info.Height];
             for (int row = (int)info.Height-1; row >= 0; --row)
@@ -86,21 +90,25 @@ namespace GameRes.Formats.Kaguya
                 output.Write (image.Width);
                 output.Write (image.Height);
                 output.Write ((short)24);
+                WriteBitmapData (file, image);
+            }
+        }
 
-                var bitmap = image.Bitmap;
-                if (bitmap.Format != PixelFormats.Bgra32)
-                {
-                    bitmap = new FormatConvertedBitmap (bitmap, PixelFormats.Bgra32, null, 0);
-                }
-                int stride = (int)image.Width * 4;
-                byte[] row_data = new byte[stride];
-                Int32Rect rect = new Int32Rect (0, (int)image.Height, (int)image.Width, 1);
-                for (uint row = 0; row < image.Height; ++row)
-                {
-                    --rect.Y;
-                    bitmap.CopyPixels (rect, row_data, stride, 0);
-                    output.Write (row_data);
-                }
+        protected void WriteBitmapData (Stream file, ImageData image)
+        {
+            var bitmap = image.Bitmap;
+            if (bitmap.Format != PixelFormats.Bgra32)
+            {
+                bitmap = new FormatConvertedBitmap (bitmap, PixelFormats.Bgra32, null, 0);
+            }
+            int stride = (int)image.Width * 4;
+            byte[] row_data = new byte[stride];
+            Int32Rect rect = new Int32Rect (0, (int)image.Height, (int)image.Width, 1);
+            for (uint row = 0; row < image.Height; ++row)
+            {
+                --rect.Y;
+                bitmap.CopyPixels (rect, row_data, stride, 0);
+                file.Write (row_data, 0, row_data.Length);
             }
         }
     }
diff --git a/supported.html b/supported.html
index d4f874d0..82c5bafb 100644
--- a/supported.html
+++ b/supported.html
@@ -308,12 +308,13 @@ Yatohime Zankikou<br/>
 <tr class="odd"><td>*.eri<br/>*.mio</td><td><tt>Entis\x1a</tt></td><td>No</td></tr>
 <tr><td>*.saf</td><td>-</td><td>No</td><td>Lune</td><td>Rinkan Gakuen</td></tr>
 <tr class="odd"><td>*.arc+*.ari</td><td><tt>WFL1</tt></td><td>No</td><td rowspan="2">KaGuYa</td><td rowspan="2">
+Dungeon Crusaderz 2 ~Eigou no Rakudo~<br/>
 Onna Kyoushi<br/>
 Medorei ~Okasareta Houkago~<br/>
 Serina<br/>
 Ura Nyuugaku ~Ineki ni Nureta Kyoukasho~<br/>
 </td></tr>
-<tr class="odd"><td>*.bg_<br/>*.cg_</td><td><tt>AP</tt></td><td>Yes</td></tr>
+<tr class="odd"><td>*.bg_<br/>*.cg_<br/>*.sp_</td><td><tt>AP</tt><br/><tt>AO</tt></td><td>Yes</td></tr>
 <tr><td>*.dpk</td><td><tt>DPK</tt></td><td>No</td><td rowspan="2">DAC</td><td rowspan="2">Yumemiru Tsuki no Lunalutia</td></tr>
 <tr><td>*.dgc</td><td><tt>DGC</tt></td><td>No</td></tr>
 <tr class="odd"><td>*.pck</td><td>-</td><td>No</td><td rowspan="5">Crowd</td><td rowspan="5">