Otouto wa, Ookami.

Beitofuku's father remarried a week ago and her step brother turns out to be the school's most popular guy, Aizawa Hiroki. Giving the appearance of a gentleman it turns out he's a huge playboy, trying to "capture" her to prove they can't be a family!? Included one-shot: Kanzen Date Manual (完全デートマニュア