Nobu returns to his hometown feeling homesick. He has quit his job and plans to go back to his parents' house, but feeling awkward about it, he asks his senior, Yuta, if he can stay at his place instead—figuring it would be more comfortable than returning home. That night, Yuta's mother, Waka Takatsuki, warmly welcomes him and joins him for drinks. Nobu ends up getting too drunk and collapses on the sofa. When he wakes up the next morning, he is shocked to find Waka, still intoxicated, exposing herself and passionately craving the body of her own son, Yuta. Stunned by the unbelievable scene, Nobu remains aroused and restless throughout the day. Then suddenly, Waka appears before him again, setting off a chain of events that deeply stirs his emotions.