On his first visit to the family of the girlfriend he hopes to marry, he discovers they are a distinguished Kyoto household and is greeted by her kimono-clad mother Kanna. Eyeing him critically, she approaches: “I’ll make sure you’re worthy.” Kanna teases his crotch and whispers dirty words into his ear until he ejaculates. Instead of going soft, the impossible thrill of being made to come by his girlfriend’s mother keeps him hard and changes Kanna’s expression. She secretly controls his orgasms from then on, eventually begins a physical relationship, and makes him addicted to her edging and dirty talk. Their affair continues behind his girlfriend’s back.