Kenji has fallen in love with his friend's mother, Nanaho. He comes to his friend's house almost every day, hoping to catch a glimpse of her. Her beauty never fades, and Kenji's sexual desire grows stronger every day. However, Nanaho is his friend's mother. Kenji's feelings become twisted as his love for her never comes true, and he sneaks into her bedroom to satisfy his desire by stealing Nanaho's underwear, but... For some reason, he finds adult toys on the shelf where the underwear is kept...