diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index 977869aa..db030843 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -104,6 +104,7 @@
     <Compile Include="NSystem\WidgetMSD.xaml.cs">
       <DependentUpon>WidgetMSD.xaml</DependentUpon>
     </Compile>
+    <Compile Include="Pandora\ImageXL24.cs" />
     <Compile Include="rUGP\ArcRIO.cs" />
     <Compile Include="Astronauts\ArcGXP.cs" />
     <Compile Include="Banana\ImageGEC.cs" />
diff --git a/ArcFormats/Pandora/ImageXL24.cs b/ArcFormats/Pandora/ImageXL24.cs
new file mode 100644
index 00000000..ae069592
--- /dev/null
+++ b/ArcFormats/Pandora/ImageXL24.cs
@@ -0,0 +1,128 @@
+//! \file       ImageXL24.cs
+//! \date       Thu Jan 05 02:18:34 2017
+//! \brief      Pandora.box image format.
+//
+// Copyright (C) 2017 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.Windows.Media;
+using GameRes.Utility;
+
+namespace GameRes.Formats.Terios
+{
+    [Export(typeof(ImageFormat))]
+    public class Xl24Format : ImageFormat
+    {
+        public override string         Tag { get { return "XL24"; } }
+        public override string Description { get { return "\"Pandora.box\" image format"; } }
+        public override uint     Signature { get { return 0x34324C58; } } // 'XL24'
+
+        public Xl24Format ()
+        {
+            Extensions = new string[] { "bmp" };
+        }
+
+        public override ImageMetaData ReadMetaData (IBinaryStream file)
+        {
+            file.Position = 8;
+            uint width  = file.ReadUInt32();
+            uint height = file.ReadUInt32();
+            return new ImageMetaData
+            {
+                Width = width,
+                Height = height,
+                BPP = 24,
+            };
+        }
+
+        public override ImageData Read (IBinaryStream file, ImageMetaData info)
+        {
+            file.Position = 0x10;
+            int stride = (int)info.Width * 3;
+            var pixels = new byte[info.Height * stride];
+            int prev_line = 0;
+            int cur_line = pixels.Length - stride;
+            while (cur_line >= 0)
+            {
+                int dst = cur_line;
+                for (int x = (int)info.Width; x > 0; )
+                {
+                    byte ctl = file.ReadUInt8();
+                    int count;
+                    switch (ctl)
+                    {
+                    case 0:
+                        count = file.ReadUInt8() + 2;
+                        dst += 3 * count;
+                        x -= count;
+                        break;
+                    case 1:
+                        dst += 3;
+                        --x;
+                        break;
+                    case 0x80:
+                        x = 0;
+                        break;
+                    case 0xFF:
+                        file.Read (pixels, dst, 3);
+                        if (--x > 0)
+                            Binary.CopyOverlapped (pixels, dst, dst+3, x * 3);
+                        x = 0;
+                        break;
+                    default:
+                        if (ctl > 0x80)
+                        {
+                            count = ctl - 0x80;
+                            file.Read (pixels, dst, 3);
+                            if (count > 1)
+                                Binary.CopyOverlapped (pixels, dst, dst+3, (count - 1) * 3);
+                            dst += count * 3;
+                            x -= count;
+                        }
+                        else
+                        {
+                            count = 3 * ctl;
+                            file.Read (pixels, dst, count);
+                            dst += count;
+                            x -= ctl;
+                        }
+                        break;
+                    }
+                }
+                if (prev_line != 0)
+                {
+                    for (int i = 0; i < stride; ++i)
+                        pixels[cur_line+i] ^= pixels[prev_line+i];
+                }
+                prev_line = cur_line;
+                cur_line -= stride;
+            }
+            return ImageData.Create (info, PixelFormats.Bgr24, null, pixels, stride);
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("Xl24Format.Write not implemented");
+        }
+    }
+}
diff --git a/supported.html b/supported.html
index 0875ffdb..9627ff6d 100644
--- a/supported.html
+++ b/supported.html
@@ -128,6 +128,7 @@ Arpeggio ~Kimi Iro no Melody~<br/>
 Chikan Kizoku<br/>
 Futagoza no Paradox<br/>
 Happy Princess<br/>
+Happy Princess ~Another Fairytale~<br/>
 Idol ☆ Revolution<br/>
 Katahane<br/>
 Narimono<br/>
@@ -492,7 +493,9 @@ Gangsta Republica<br/>
 Koi no Honey Trap<br/>
 Love-Bride Eve<br/>
 Nekonade Distortion<br/>
+Niizuma wa Mahou Shoujo<br/>
 Ore-tachi ni Tsubasa wa Nai<br/>
+Ren'ai Harem ~Daisuki tte Iwasete~<br/>
 Rikorisu ~Lycoris Radiata~<br/>
 Sakura Synchronicity<br/>
 Shinsetsu Ryouki no Ori Dai 2 Shou<br/>
@@ -894,9 +897,11 @@ Oni Kagura<br/>
 Tokino Senka<br/>
 Tsuki Kagura<br/>
 </td></tr>
-<tr class="odd"><td>*.pbx</td><td><tt>Pandora.box</tt></td><td>No</td><td>Terios</td><td>
+<tr class="odd"><td>*.pbx</td><td><tt>Pandora.box</tt></td><td>No</td><td rowspan="2">Terios</td><td rowspan="2">
+Elysion ~Eien no Sanctuary~<br/>
 Ikinari Happy Bell<br/>
 </td></tr>
+<tr class="odd last"><td>*.bmp</td><td><tt>XL24</tt></td><td>No</td></tr>
 <tr><td>*.pk<br/>*.dat</td><td>-</td><td>No</td><td rowspan="3">BANANA Shu-Shu<br/>Yellow Pig</td><td rowspan="3">
 Tama Tama ~Tonari no Kanojo...<br/>
 Tama Tama Christmas Box<br/>
@@ -1294,6 +1299,9 @@ Doreijou<br/>
 <tr><td>*.pfs</td><td><tt>pf8</tt></td><td>No</td><td>Artemis Engine</td><td>
 Boku no Elf Onee-san<br/>
 </td></tr>
+<tr class="odd"><td>*.dat</td><td>-</td><td>No</td><td>Youkai Tamanokoshi</td><td>
+Tsumadori
+</td></tr>
 </table>
 <p><a name="note-1" class="footnote">1</a> Non-encrypted only</p>
 </body>