Kazuya can't contain his joy when he hears that his mother's friend Umi, who taught him how to study when he was a student, is returning home after a long time. When I met Umi again, she became more beautiful than before. Even now, Kazuya's secret feelings for her continue to grow, and he has a relationship with her. Kazuya, who has lost her control, continues to be swept away by her lust and asks for her infatuation. However, she says that such an extraordinary relationship cannot continue.
