101009 [世界一受けたい授業 秋の最先生来襲スペシャル] with Hina and Yoko representing DERO!
The whole special episode (>3hrs) has been uploaded here - http://v.youku.com/v_show/id_XMjEzNzk1ODI0.html
I still haven't see any download links though...

Update: I found a torrent to a HQ (1280x720, 3GB) version of the special. I just can't seem to be able to download from torrents but maybe this will be useful to others.
u The whole special episode (>3hrs) has been uploaded here - http://v.youku.com/v_show/id_XMjEzNzk1ODI0.html
I still haven't see any download links though...

Update: I found a torrent to a HQ (1280x720, 3GB) version of the special. I just can't seem to be able to download from torrents but maybe this will be useful to others.