Comic Market 82: Nise MIDI Doronokai / 偽MIDI泥の会 / Ishikei

Gonzo doujin extraordinaire Ishikei has updated his website today with a cover shot of his circle NiseMIDIdoronokai's release for Comic Market 82:

I hate having to admit I don't know what anime series this is a parody of, but that won't stop me from purchasing this.  I will update once I have half a clue!

Updated @ 8:39 pm 8/12--It's Kuroyukihime, Chiyuri Kurashima, and Fuuko Kurasaki from Accel World!  Thanks to the infinitely more knowledgeable anonymous denizens of /a/ for the information.