Sayuri and her son Tadashi have fallen into a daily routine of desiring each other's bodies. It all began a few days ago when Sayuri discovered Tadashi masturbating. When she confronted him, he admitted he had been secretly watching her change clothes, which had aroused him. Since then, he couldn't stop pleasuring himself, and Sayuri gently guided his hand, helping him release. As they carefully acknowledged each other's feelings, a new relationship gradually formed between them.