A weakened 'Shigeru,' who needs care, lives with his son and daughter-in-law, 'Tamaki' and 'Toshifumi.' Shigeru often feels depressed due to his infirmity. One day, he witnesses his son and daughter-in-law having sex and realizes that his own member is erect. Pretending to be frail, Shigeru initiates erotic acts, and Tamaki, unable to refuse him, eventually…
