As a probation officer, Akemi took care of Seita. She developed special feelings for him because he happened to resemble her late husband. To ensure she wouldn't repeat the same mistake twice, Akemi made two promises with Seita: one was that he would reform and never stray again, and the other was that she would offer him her anus. Meanwhile, Ikio, Akemi's son, who felt dissatisfied with his mother for not caring about him, conspired with his delinquent friends to plot something against Akemi...
