Eriko's daughter and her husband return home to Eriko, who has lost her husband and is living a lonely life. Eriko felt the joy of being her parent, seeing her lively home for the first time in a while. Tatsuya is nervous about his beautiful stepmother, and when he wakes up one night unable to sleep, he sees Eriko's naked body flushing after taking a bath through the gap in the slightly open door. The next morning, Tatsuya, unable to leave the scene burned in his mind, goes to the house while he is cleaning.