implemented 'Game System' CHR images.

supported.html

@@ -704,6 +704,8 @@ Yuukyou Gangu 2<br/>
 Asa no Konai Yoru ni Dakarete -Eternal Night-<br/>
 Guren ni Somaru Gin no Rozario<br/>
 Konata yori Kanata made<br/>
+Natural ~Mi mo Kokoro mo~<br/>
+Natural2 -DUO-<br/>
 Niji no Kanata ni<br/>
 Thirua Panic<br/>
 </td></tr>
@@ -741,6 +743,7 @@ Vampire Crusaders<br/>
 <tr class="odd last"><td>*.hip<br/>*.hiz<br/></td><td><tt>hip</tt><br/><tt>hiz</tt></td><td>No</td></tr>
 <tr><td>*.gpk+*.gtb<br/>*.vpk+*.vtb</td><td>-</td><td>No</td><td rowspan="3">Black Cyc</td><td rowspan="3">
 Before Dawn Daybreak ~Shinen no Utahime~<br/>
+Extravaganza ~Mushi Mederu Shoujo~<br/>
 Gun-Katana<br/>
 Hana Goyomi<br/>
 Jishou Seirei Majutsushi vs Shinsei Daiikkyuu Akuma<br/>
@@ -1330,7 +1333,7 @@ Onepapa ~Onegai PaPa!~<br/>
 <tr><td>*.cmp</td><td>-</td><td>No</td><td rowspan="2">0verflow</td><td rowspan="2">
 Summer Radish Vacation!!<br/>
 </td></tr>
-<tr><td>*.cgd<br/>*.bgd</td><td>-</td><td>No</td></tr>
+<tr><td>*.cgd<br/>*.bgd<br/>*.chr</td><td>-</td><td>No</td></tr>
 </table>
 <p><a name="note-1" class="footnote">1</a> Non-encrypted only</p>
 </body>