Synopsis: Otouto wa, Ookami.

Just a week ago, Beitofuku's father tied the knot for the second time, and her new step brother Aizawa Hiroki happens to be the most popular guy at their school. Although he puts up the facade of a gentleman, it appears that he is a notorious playboy who is determined to "conquer" Beitofuku to disprove their familial relationship?! The manga also features one-shots such as Kimi Fechi and Kanzen Date Manual.