diff --git a/ArcFormats/Cmvs/CmvsMD5.cs b/ArcFormats/Cmvs/CmvsMD5.cs
index dc07dbf7..7042ec40 100644
--- a/ArcFormats/Cmvs/CmvsMD5.cs
+++ b/ArcFormats/Cmvs/CmvsMD5.cs
@@ -2,7 +2,7 @@
 //! \date       Mon Nov 30 13:29:27 2015
 //! \brief      Cmvs engine MD5 update algorithm.
 //
-// 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
@@ -27,7 +27,7 @@ using GameRes.Utility;
 
 namespace GameRes.Formats.Cmvs
 {
-    public enum Md5Variant { A, B, Chrono, Memoria }
+    public enum Md5Variant { A, B, Chrono, Memoria, Natsu }
 
     public abstract class MD5 : Cryptography.MD5Base
     {
@@ -44,6 +44,7 @@ namespace GameRes.Formats.Cmvs
             case Md5Variant.B: return new Md5VariantB();
             case Md5Variant.Chrono: return new Md5Chrono();
             case Md5Variant.Memoria: return new Md5Memoria();
+            case Md5Variant.Natsu: return new Md5Natsu();
             default: throw new System.ArgumentException ("Unknown MD5 variant", "variant");
             }
         }
@@ -131,4 +132,23 @@ namespace GameRes.Formats.Cmvs
             data[3] = m_state[0];
         }
     }
+
+    public class Md5Natsu : MD5
+    {
+        protected override void InitState ()
+        {
+            m_state[0] = 0x63FE9A7C;
+            m_state[1] = 0xC2B93E98;
+            m_state[2] = 0xEF91BA5C;
+            m_state[3] = 0x72C9A82E;
+        }
+
+        protected override void SetResult (uint[] data)
+        {
+            data[0] = m_state[1] + 0x45876329;
+            data[1] = m_state[2] ^ 0x54F36D6C;
+            data[2] = m_state[3] + 0x4387A749;
+            data[3] = m_state[0] ^ 0xE3F9A742;
+        }
+    }
 }
diff --git a/supported.html b/supported.html
index 37e15fb2..24dc174a 100644
--- a/supported.html
+++ b/supported.html
@@ -465,6 +465,7 @@ Oto☆Puri<br/>
 Prawf Clwyd<br/>
 Rakuen no Rukia ~Blood Moon Rising~<br/>
 Samayou Mitama ni Yasuragi no Toki wo<br/>
+School Five ~Itsutsu no Himitsu no Monogatari~<br/>
 Time Trouble ~Marie ni Kubikkake~<br/>
 </td></tr>
 <tr><td>*.dat</td><td>-</td><td>No</td><td>Ail</td><td>
@@ -881,6 +882,7 @@ Chrono Clock<br/>
 Hapymaher<br/>
 Haruiro Ouse<br/>
 Memoria<br/>
+Natsu ni Kanaderu Bokura no Uta<br/>
 </td></tr>
 <tr class="last"><td>*.pb3</td><td><tt>PB3B</tt></td><td>No</td></tr>
 <tr class="odd"><td>*.g2<br/>*.stx</td><td>-</td><td>No</td><td rowspan="2">GLib2</td><td rowspan="2">
@@ -1086,8 +1088,9 @@ Kuraibito<br/>
 Natsu Doki! Harem<br/>
 Naze ka Kanojo ga Boku ni Ecchi o Sematte Kuru Ken<br/>
 Onna Kyoushi Suzune<br/>
-Oshioki ~Gakuen Reijou Kousei Keikaku~<br/>
 Ore Maou! ~Kudake Chitta Tamashii<br/>
+Oshioki ~Gakuen Reijou Kousei Keikaku~<br/>
+Ouma no Shoku ~Sei ni Tsukaeshi Yami no Guuzou~<br/>
 Volley Coaching!<br/>
 Zoku Etsuraku no Tane<br/>
 </td></tr>
@@ -1177,6 +1180,7 @@ Lost Child<br/>
 <tr class="odd last"><td>*.esd</td><td><tt>ESD</tt></td><td>No</td></tr>
 <tr><td>*.pak</td><td><tt>NEKOPACK4A</tt></td><td>No</td><td>NekoSDK</td><td>
 In Vitro Shoujo -Aragaishi Junshin Naru Shoujo-<br/>
+Shirudaku Settai Okawari Ippaime<br/>
 </td></tr>
 <tr class="odd"><td>*.pcf</td><td><tt>PackCode</tt></td><td>No</td><td rowspan="2">Symphony</td><td rowspan="2">
 Tiara<br/>