My friend's mother

Akira comes to visit her new friend's house for the first time. There he met Mother Eri, who was so beautiful. Unlike her mother, Akira falls in love with Eri, her youthful and kind, at first sight, but she sees a shocking sight of her faint love being crushed. Eri had taken a stranger into her room and committed an affair. With her son and her friend in the next room, Akira is furious when Eri sees her slumbering on the cock of a man who isn't her husband...