Saito was confused by his excitement as he peeked at his friend's mother, Chitose. On the day he came to his friend Momoyama's house, Saito witnessed Chitose masturbating. He was captivated by the sight. He had no idea that an older woman could be so erotic... Saito was drawn to the sight of Chitose, who continued to moan without noticing his gaze, and he couldn't stay still. He wanted to get closer to Chitose somehow. However, Saito was a virgin and didn't know how to interact with women, so the plan he came up with was too naive.