His father, who also looked at Takashi who could not study, asked his colleague's wife, Riho, to tutor, but Takashi was worried about the beautiful tutor, Riho's chest, and could not concentrate on studying. Riho is ashamed of Takashi's cuteness and momentum, but she removes her bra ... Inspired by the sexual desire of young boys, Riho's private lessons develop erotically ...!