Full color King of Fighters doujinshi illustrated by Ishoku Dougen (aka Saigado) released at Comiket 70.

Title: THE YURI & FRIENDS FULL COLOR 8 PRIVATE STOCK
Circle: 彩画堂 (Saigado)
Artist: 異食同元 (Ishoku Dougen)

http://doujinshi.mugimugi.org/book/2957/The-Yuri--Friends-Full-Color-8-Private-Stock/
http://exhentai.org/g/84359/68249dc48f/