[UPDATE] - Some more pics at Dengeki and news of an illustrated booklet coming with game, out in Japan on 14 April.
Okaaaaaay, there's a story on Famitsu about a game, Akiba's Trip (or Akiba Strip depending on how you look at it), where one of the special fighting moves is to rip your opponent's (and by opponent they mean demonic schoolgirl hell-beast, naturally) clothes off. I think the point is to check the opponent in a special mirror to see if they're human or demon/vampire, but the translation is naturally a bit flaky.
So have some gratuitous PSP flesh tone pixels and wonder why western games don't take this route to identifying protagonists.
[UPDATE] - New video here.