My mother's friend

Seigo, his son, remembers the excitement of his first love, to his mother's friend Ayumi, who returns to his hometown for the first time in 10 years. That night, by chance, Ayumi, who is in a good mood, is invited to kiss her, but... Seigo, who was still in a lame mood, couldn't be helped by her bold actions, so she made up her mind and sneaked into the bathroom and saw Ayumi masturbating. Seigo hurriedly flees the scene, but Ayumi realizes this and visits Seigo's room late at night...