Hitorijime: Choukyou Ganbou

Masahiro parents has remarried and he is supposed to live with them, and a honor student Rei who is in the same class with Masahiro "think that a guy who think nothing but sex only shouldn't be allowed to live together" her word enrage Masahiro and he began to distant himself from her and on that moment, an unexpected reaction from Rei....?
(Source: Chibi Manga)