diff --git a/ArcFormats/Aoi/ArcBOX.cs b/ArcFormats/Aoi/ArcBOX.cs
index 1267a04d..d99babf3 100644
--- a/ArcFormats/Aoi/ArcBOX.cs
+++ b/ArcFormats/Aoi/ArcBOX.cs
@@ -53,6 +53,7 @@ namespace GameRes.Formats.Aoi
         public override bool      CanWrite { get { return false; } }
 
         static readonly Dictionary<int, byte> VersionKeyMap = new Dictionary<int, byte> {
+            {  4, 0xAD },
             {  5, 0xAD },
             {  6, 0xB4 },
             {  7, 0xB4 },
@@ -73,6 +74,8 @@ namespace GameRes.Formats.Aoi
                 version = 6;
             else if (file.View.AsciiEqual (4, "OX5 "))
                 version = 5;
+            else if (file.View.AsciiEqual (4, "OX4 "))
+                version = 4;
             else
                 return null;
             int count = file.View.ReadInt32 (8);
diff --git a/supported.html b/supported.html
index 382ebf01..ecd3e5a3 100644
--- a/supported.html
+++ b/supported.html
@@ -959,12 +959,13 @@ Brown Doori Sanbanme<br/>
 Daisounan<br/>
 Dancing Crazies<br/>
 Level Justice<br/>
+Mahiru ni Odoru Hanzaisha<br/>
 Ouzoku<br/>
 Planet Dragon<br/>
 </td></tr>
 <tr><td>*.iph</td><td><tt>RIFF....IPH fmt</tt></td><td>No</td></tr>
 <tr><td>*.aog</td><td><tt>AoiOgg</tt></td><td>No</td></tr>
-<tr><td>*.box</td><td><tt>AOIBOX5</tt><br/><tt>AOIBOX7</tt><br/><tt>AOIBX10</tt><br/><tt>AOIBX12</tt><br/><tt>AOIMY01</tt></td><td>No</td></tr>
+<tr><td>*.box</td><td><tt>AOIBOX4</tt><br/><tt>AOIBOX5</tt><br/><tt>AOIBOX7</tt><br/><tt>AOIBX10</tt><br/><tt>AOIBX12</tt><br/><tt>AOIMY01</tt></td><td>No</td></tr>
 <tr class="last"><td>*.agf</td><td><tt>AGF</tt></td><td>No</td></tr>
 <tr class="odd"><td>*.gd+*.dll</td><td>-</td><td>No</td><td>Xuse</td><td>
 Eien no Aselia -The Spirit of Eternity Sword-
@@ -1222,6 +1223,7 @@ Triangle Heart 1-2-3<br/>
 <tr class ="odd last"><td>*.px</td><td><tt>fPX</tt></td><td>No</td></tr>
 <tr><td>*.fpk</td><td><tt>FPK 0100</tt></td><td>No</td><td>MoonhirGames</td><td>
 Bitchin Beach<br/>
+Doushite? Ijitte Princess Final Road<br/>
 Pretty Devil Paradise ~Millium Makai Dakkan Shirei~<br/>
 S Sensei no Koto<br/>
 </td></tr>