720p: Torrent | DDL
1080p: Torrent | DDL

This is the OVA that came with the BD Box.
The story of subbing this goes as follows:
ryuu_zer0 something something and here we are.
Special thanks to lyger for translating/QCing/making karaoke.
No thanks to KmE who slowpoked it.
Ryuu_zer0 stinx too.

Joint with Evetaku.