Yamaguchi takes another crushing loss at pachinko and splurges on an escort service specializing in married women to relieve his stress. The woman who arrives is gorgeous, charming, and exceptional at her job—a jackpot booking in every way. But she turns out to be his former homeroom teacher, the woman he believes abandoned him when he was a delinquent. Blaming her for ruining his life, Yamaguchi sees a chance to settle his long-held grudge and begins plotting revenge sex.