This work features an amateur submission originally published in an SM magazine, depicting college student Yumi Hirota being kept by R-sensei, her former middle school teacher. The story portrays the two characters, who once harbored secret feelings for each other, reuniting at a class reunion and gradually entering a taboo relationship. This particular submission is a special project realized from R-sensei's desire to show off the masochist he has trained. Yumi proves to be an exceptionally deep female masochist, subjected in detail to intense BDSM play including cruciform restraint, nine-tailed whip flogging, full-body bondage, and hot wax torture. The film thoroughly captures the evolving dynamic between her profound submission and his dominant control, allowing viewers to fully experience the progression of their twisted bond.