Targeted mother's anus

Akemi, who is looking after Ikuta as a probation officer, begins to feel special feelings for him because he coincidentally resembles her husband, who she lost. Akemi makes two promises with Ikuta in order to avoid making the same mistake twice. One was to rehabilitate himself and never go astray again, and the other was to sacrifice his anus. On the other hand, her son Ikuo, dissatisfied with his mother who doesn't care about him, colludes with his fellow delinquents and hatches a plan against Akemi...