Hitorijime: Choukyou Ganbou

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