His wife, Eri, was in an accident and was hospitalized. Satoshi was living alone for a while until Eri was released from the hospital, and his mother-in-law, Yuko, came to stay with him. She ran the washing machine efficiently and wiped the floor in her free time. Satoshi was watching Yuko do the housework with a passionate gaze... But then Satoshi remembered how Yuko had embraced him tenderly on the day Eri had the accident. And Satoshi could no longer suppress his feelings for Yuko...