There was a reason why Hashimoto, who is known for being popular in real life, was friendly with the introverted Ryota. It was because he wanted to make love to Ryota's mother, Mai. Her voluptuous body was obvious even when she was wearing clothes... and her chaste nature, in contrast to her flashy appearance, made him feel even darker. One day, Hashimoto overheard Mai talking on the phone with her husband. It seemed that Mai was lonely because her husband was busy with work and she couldn't see him very often. When Mai hung up the phone, she started to pleasure herself without noticing Hashimoto's presence...