In this adult mother-and-son role-play, the once-wealthy Kazama family has fallen on hard times after the father’s business fails. Giving up on her husband, Yumi devotes herself to raising her adult son Seitaro into a respectable man. Her education becomes so strict that Seitaro finally explodes and pins her down. Yumi calms him by saying that if he wants it that badly, his mother will teach him, then begins giving him a sexual education. Years of discipline leave him unable to disobey her commands, and Yumi’s brutal training grows ever more extreme as she exploits both his adult sex drive and rebellious streak.