diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index 86d58d8e..6c7955ef 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -99,6 +99,9 @@
       <DependentUpon>WidgetBELL.xaml</DependentUpon>
     </Compile>
     <Compile Include="DDSystem\ArcDDP.cs" />
+    <Compile Include="ExHibit\WidgetGYU.xaml.cs">
+      <DependentUpon>WidgetGYU.xaml</DependentUpon>
+    </Compile>
     <Compile Include="Ipac\ArcIPAC.cs" />
     <Compile Include="Ipac\AudioWST.cs" />
     <Compile Include="Ipac\ImageIES.cs" />
@@ -606,6 +609,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="ExHibit\WidgetGYU.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="FC01\WidgetMCG.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
diff --git a/ArcFormats/ExHibit/ImageGYU.cs b/ArcFormats/ExHibit/ImageGYU.cs
index d8844521..b96f131d 100644
--- a/ArcFormats/ExHibit/ImageGYU.cs
+++ b/ArcFormats/ExHibit/ImageGYU.cs
@@ -2,7 +2,7 @@
 //! \date       Mon Nov 02 00:38:41 2015
 //! \brief      ExHIBIT engine image format.
 //
-// Copyright (C) 2015 by morkt
+// Copyright (C) 2015-2016 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
@@ -25,12 +25,16 @@
 
 using System;
 using System.ComponentModel.Composition;
+using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using System.Windows.Media.Imaging;
 using System.Windows.Media;
 using GameRes.Utility;
 using GameRes.Compression;
 using GameRes.Cryptography;
+using GameRes.Formats.Strings;
+using GameRes.Formats.Properties;
 
 namespace GameRes.Formats.ExHibit
 {
@@ -44,6 +48,12 @@ namespace GameRes.Formats.ExHibit
         public int  PaletteSize;
     }
 
+    [Serializable]
+    public class GyuMap : ResourceScheme
+    {
+        public Dictionary<string, Dictionary<int, uint>> KnownKeys;
+    }
+
     [Export(typeof(ImageFormat))]
     public class GyuFormat : ImageFormat
     {
@@ -51,6 +61,14 @@ namespace GameRes.Formats.ExHibit
         public override string Description { get { return "ExHIBIT engine image format"; } }
         public override uint     Signature { get { return 0x1A555947; } } // 'GYU'
 
+        public static Dictionary<string, Dictionary<int, uint>> KnownKeys = new Dictionary<string, Dictionary<int, uint>>();
+
+        public override ResourceScheme Scheme
+        {
+            get { return new GyuMap { KnownKeys = KnownKeys }; }
+            set { KnownKeys = ((GyuMap)value).KnownKeys; }
+        }
+
         public override ImageMetaData ReadMetaData (Stream stream)
         {
             using (var reader = new ArcView.Reader (stream))
@@ -71,12 +89,28 @@ namespace GameRes.Formats.ExHibit
             }
         }
 
+        IDictionary<int, uint> CurrentMap = null;
+
         public override ImageData Read (Stream stream, ImageMetaData info)
         {
             var meta = (GyuMetaData)info;
             if (0 == meta.Key)
-                throw new UnknownEncryptionScheme ("Unknown image encryption key");
-
+            {
+                bool got_key = false;
+                var name = Path.GetFileNameWithoutExtension (meta.FileName);
+                int num;
+                if (int.TryParse (name, out num))
+                {
+                    if (null == CurrentMap)
+                        CurrentMap = QueryScheme();
+                    got_key = CurrentMap != null && CurrentMap.TryGetValue (num, out meta.Key);
+                }
+                if (!got_key)
+                {
+                    CurrentMap = null;
+                    throw new UnknownEncryptionScheme ("Unknown image encryption key");
+                }
+            }
             var reader = new GyuReader (stream, meta);
             reader.Unpack();
             return ImageData.CreateFlipped (meta, reader.Format, reader.Palette, reader.Data, reader.Stride);
@@ -86,6 +120,33 @@ namespace GameRes.Formats.ExHibit
         {
             throw new System.NotImplementedException ("GyuFormat.Write not implemented");
         }
+
+        private IDictionary<int, uint> QueryScheme ()
+        {
+            if (0 == KnownKeys.Count)
+                return null;
+            if (1 == KnownKeys.Count)
+                return KnownKeys.First().Value;
+            var options = Query<GyuOptions> (arcStrings.GYUImageEncrypted);
+            return options.Scheme;
+        }
+
+        public override ResourceOptions GetDefaultOptions ()
+        {
+            return new GyuOptions { Scheme = GetScheme (Settings.Default.GYUTitle) };
+        }
+
+        public override object GetAccessWidget ()
+        {
+            return new GUI.WidgetGYU();
+        }
+
+        Dictionary<int, uint> GetScheme (string title)
+        {
+            Dictionary<int, uint> scheme = null;
+            KnownKeys.TryGetValue (title, out scheme);
+            return scheme;
+        }
     }
 
     internal sealed class GyuReader
@@ -284,4 +345,9 @@ namespace GameRes.Formats.ExHibit
             }
         }
     }
+
+    public class GyuOptions : ResourceOptions
+    {
+        public IDictionary<int, uint> Scheme;
+    }
 }
diff --git a/ArcFormats/ExHibit/WidgetGYU.xaml b/ArcFormats/ExHibit/WidgetGYU.xaml
new file mode 100644
index 00000000..fa4736f6
--- /dev/null
+++ b/ArcFormats/ExHibit/WidgetGYU.xaml
@@ -0,0 +1,10 @@
+<StackPanel x:Class="GameRes.Formats.GUI.WidgetGYU"
+            xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+            xmlns:p="clr-namespace:GameRes.Formats.Properties"
+            xmlns:ex="clr-namespace:GameRes.Formats.ExHibit">
+    <ComboBox Name="Title" ItemsSource="{Binding Source={x:Static ex:GyuFormat.KnownKeys}, Mode=OneWay}"
+              SelectedValue="{Binding Source={x:Static p:Settings.Default}, Path=GYUTitle, Mode=TwoWay}"
+              SelectedValuePath="Key" DisplayMemberPath="Key"
+              Width="200" Grid.Row="1" HorizontalAlignment="Left"/>
+</StackPanel>
diff --git a/ArcFormats/ExHibit/WidgetGYU.xaml.cs b/ArcFormats/ExHibit/WidgetGYU.xaml.cs
new file mode 100644
index 00000000..bf681387
--- /dev/null
+++ b/ArcFormats/ExHibit/WidgetGYU.xaml.cs
@@ -0,0 +1,15 @@
+using System.Windows.Controls;
+
+namespace GameRes.Formats.GUI
+{
+    /// <summary>
+    /// Interaction logic for WidgetGYU.xaml
+    /// </summary>
+    public partial class WidgetGYU : StackPanel
+    {
+        public WidgetGYU()
+        {
+            InitializeComponent();
+        }
+    }
+}
diff --git a/ArcFormats/Properties/Settings.Designer.cs b/ArcFormats/Properties/Settings.Designer.cs
index 9dea8703..0dd33c4d 100644
--- a/ArcFormats/Properties/Settings.Designer.cs
+++ b/ArcFormats/Properties/Settings.Designer.cs
@@ -621,5 +621,17 @@ namespace GameRes.Formats.Properties {
                 this["TacticsArcTitle"] = value;
             }
         }
+        
+        [global::System.Configuration.UserScopedSettingAttribute()]
+        [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+        [global::System.Configuration.DefaultSettingValueAttribute("")]
+        public string GYUTitle {
+            get {
+                return ((string)(this["GYUTitle"]));
+            }
+            set {
+                this["GYUTitle"] = value;
+            }
+        }
     }
 }
diff --git a/ArcFormats/Properties/Settings.settings b/ArcFormats/Properties/Settings.settings
index 16349e7b..8e0c5aae 100644
--- a/ArcFormats/Properties/Settings.settings
+++ b/ArcFormats/Properties/Settings.settings
@@ -152,5 +152,8 @@
     <Setting Name="TacticsArcTitle" Type="System.String" Scope="User">
       <Value Profile="(Default)" />
     </Setting>
+    <Setting Name="GYUTitle" Type="System.String" Scope="User">
+      <Value Profile="(Default)" />
+    </Setting>
   </Settings>
 </SettingsFile>
\ No newline at end of file
diff --git a/ArcFormats/Strings/arcStrings.Designer.cs b/ArcFormats/Strings/arcStrings.Designer.cs
index b8f94df6..ae4e7a8c 100644
--- a/ArcFormats/Strings/arcStrings.Designer.cs
+++ b/ArcFormats/Strings/arcStrings.Designer.cs
@@ -215,6 +215,16 @@ namespace GameRes.Formats.Strings {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Image is encrypted.
+        ///Choose appropriate encryption scheme..
+        /// </summary>
+        public static string GYUImageEncrypted {
+            get {
+                return ResourceManager.GetString("GYUImageEncrypted", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Choose game executable file.
         /// </summary>
@@ -415,7 +425,7 @@ namespace GameRes.Formats.Strings {
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to Calcualting checksum....
+        ///   Looks up a localized string similar to Calculating checksum....
         /// </summary>
         public static string MsgCalculatingChecksum {
             get {
diff --git a/ArcFormats/Strings/arcStrings.ko-KR.resx b/ArcFormats/Strings/arcStrings.ko-KR.resx
index 1f6efdf8..efb3b744 100644
--- a/ArcFormats/Strings/arcStrings.ko-KR.resx
+++ b/ArcFormats/Strings/arcStrings.ko-KR.resx
@@ -375,4 +375,8 @@
   <data name="GALChoose" xml:space="preserve">
     <value>제목을 선택하거나 암호값 입력하기</value>
   </data>
+  <data name="GYUImageEncrypted" xml:space="preserve">
+    <value>이미지가 암호화됨.
+적절한 암호체계를 선택하세요.</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/ArcFormats/Strings/arcStrings.resx b/ArcFormats/Strings/arcStrings.resx
index 0f6f2d0f..1d5db66b 100644
--- a/ArcFormats/Strings/arcStrings.resx
+++ b/ArcFormats/Strings/arcStrings.resx
@@ -179,7 +179,7 @@ Choose appropriate encryption scheme.</value>
     <value>Adding file</value>
   </data>
   <data name="MsgCalculatingChecksum" xml:space="preserve">
-    <value>Calcualting checksum...</value>
+    <value>Calculating checksum...</value>
   </data>
   <data name="MsgCompressingIndex" xml:space="preserve">
     <value>Compressing index...</value>
@@ -378,4 +378,8 @@ Choose appropriate encryption scheme.</value>
   <data name="GALChoose" xml:space="preserve">
     <value>Choose title or enter a key</value>
   </data>
+  <data name="GYUImageEncrypted" xml:space="preserve">
+    <value>Image is encrypted.
+Choose appropriate encryption scheme.</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/ArcFormats/Strings/arcStrings.ru-RU.resx b/ArcFormats/Strings/arcStrings.ru-RU.resx
index f8b0ae22..0991dec0 100644
--- a/ArcFormats/Strings/arcStrings.ru-RU.resx
+++ b/ArcFormats/Strings/arcStrings.ru-RU.resx
@@ -161,6 +161,10 @@
   <data name="GALChoose" xml:space="preserve">
     <value>Выберите наименование или введите ключ</value>
   </data>
+  <data name="GYUImageEncrypted" xml:space="preserve">
+    <value>Изображение зашифровано.
+Выберите способ шифрования.</value>
+  </data>
   <data name="INTChooseExe" xml:space="preserve">
     <value>Выберите исполняемый файл</value>
   </data>
diff --git a/ArcFormats/Strings/arcStrings.zh-Hans.resx b/ArcFormats/Strings/arcStrings.zh-Hans.resx
index d7e5ec1d..1697a55a 100644
--- a/ArcFormats/Strings/arcStrings.zh-Hans.resx
+++ b/ArcFormats/Strings/arcStrings.zh-Hans.resx
@@ -380,4 +380,8 @@ Choose appropriate encryption scheme.</value>
   <data name="GALChoose" xml:space="preserve">
     <value>请选择游戏名称或输入密钥</value>
   </data>
+  <data name="GYUImageEncrypted" xml:space="preserve">
+    <value>图像已加密。
+请选择正确的加密方式。</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/ArcFormats/app.config b/ArcFormats/app.config
index 2a03d682..6b37747a 100644
--- a/ArcFormats/app.config
+++ b/ArcFormats/app.config
@@ -154,6 +154,9 @@
             <setting name="TacticsArcTitle" serializeAs="String">
                 <value />
             </setting>
+            <setting name="GYUTitle" serializeAs="String">
+                <value />
+            </setting>
         </GameRes.Formats.Properties.Settings>
     </userSettings>
 <startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5"/></startup></configuration>
diff --git a/supported.html b/supported.html
index 3fa1103a..ef6aba64 100644
--- a/supported.html
+++ b/supported.html
@@ -122,6 +122,7 @@ Happy Princess<br/>
 Idol ☆ Revolution<br/>
 Narimono<br/>
 Reconquista<br/>
+Switch!! ~Boku ga Natsu ni Omou Koto~<br/>
 White ~blanche comme la lune~<br/>
 </td></tr>
 <tr class="odd"><td>*.rct</td><td><tt>\x98\x5A\x92\x9AT</tt></td><td>Yes</td></tr>
@@ -295,6 +296,7 @@ Eien no Owari ni<br/>
 Fuurinkanzan<br/>
 Himemiko<br/>
 Ikusa Otome Valkyrie<br/>
+Mahou Tenshi Misaki<br/>
 Mahou Tenshi Misaki 2<br/>
 Ohime-sama wa Tokkun Chuu R! ~Seinaru Mahou Shugyou~<br/>
 Onsoku Hishou Sonic Mercedes<br/>
@@ -737,6 +739,7 @@ Moshimo Ashita ga Harenaraba<br/>
 <tr class="odd"><td>*.pga</td><td><tt>PGAPGAH</tt></td><td>Yes</td></tr>
 <tr class="odd"><td>*.chr</td><td><tt>char</tt></td><td>No</td></tr>
 <tr><td>*.gyu</td><td><tt>GYU\x1a</tt></td><td>No</td><td>ExHIBIT</td><td>
+Eve ~New Generation X~<br/>
 Fuyu no Rondo<br/>
 </td></tr>
 <tr class="odd"><td>*.dat</td><td>-</td><td>No</td><td>ACTGS</td><td>
@@ -775,6 +778,7 @@ Izumo 2<br/>
 Izumo 2 ~Gakuen Kyousoukyoku~<br/>
 Izumo 3<br/>
 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>
@@ -1000,6 +1004,7 @@ Nukiani!! Sweet Home<br/>
 <tr class="odd"><td>*.arc</td><td><tt>ARCX</tt></td><td>No</td><td>Studio Jaren</td><td>
 Denpa no Dorei<br/>
 Soushinjutsu Plus<br/>
+Soushinjutsu 2<br/>
 </td></tr>
 <tr><td>*.ns2</td><td>-</td><td>No</td><td>NScripter</td><td>
 Rakuin Hime Runed Princess<br/>