While it's not quite NSFW, D3 Publisher will get you some strange looks from passing co-workers (It's for work Eugene Morton! Wooooork!) with their anime-girl-infested music game Dream C Club. Found in the pile of Xbox 360 media that Microsoft put out at it's spring showcase, rest assured Japanese Xbox 360-owners seeking a PG-rated Japanese hostess bar simulator will have... (struggling here) um... options this summer.
Well then as for the girls, Reika... yeah I'm more of a purple hair kinda guy, myself. WTF Japan!
Dream C Club Japanese Spring Showcase Trailer