Rin wants to raise her son Yoshiyuki into an excellent lawyer through strict education, just like her late husband. However, Yoshiyuki's grades never improve, and stress builds up. Rin herself accumulates sexual frustration and indulges in self-pleasure. Her son's friend Kenta sees this and Rin panics. But when she sees his erect, sturdy cock, the carnal desire she had been suppressing finally explodes. While scolding him, she begins to play with his erect cock...
