I'm a bit scared to know the answer, haha, but: http://www.mangago.me/read-manga/vanilla_...

I'm guessing it's probably just an illustration? that outfit is from puella magi madoka magica

I wanna know too! ╮(￣▽￣)╭

Isn't that kondo from gintama? In a puella magi madoka magica costume...

Thanks~