Ichika was introduced to her mother as a new lover, and it was her homeroom teacher, Riku. Although Ichika always had a boyfriend, she had actually liked Riku all along. Ichika kisses Riku who is drunk at home. Riku thinks he shouldn't lay a hand on Ichika, the daughter of his girlfriend and also his student, but he can't help being drawn to her. And Ichika, who has made Riku hers, begins to bring out Riku's true nature with reverse anal penetration, teaching him that only she can accept it…
