After school, Rion finds herself receiving one-on-one tutoring with her teacher—an arrangement that turns out to be a trap for his perverse training. No matter how many times she pleads "Stop," her resistance is meaningless in an empty classroom with no other students around. The teacher takes full advantage of the situation, growing increasingly forceful and demanding. Gradually, Rion begins to lose control, her resistance crumbling as she's drawn into overwhelming sensations. In the end, she starts begging the teacher to abuse her. This film captures her transformation from a reluctant student into a submissive pet, step by humiliating step.