Ruri has a strong sadistic streak and hates being ordered around by others! ! Because of her strong will, she treats her teachers as her servants and imposes unreasonable demands on them. One day, she is found by the vice principal when she calls the teacher to the gym storeroom and makes him help her with sexual relief. The fact that he saw her means that he also knows what Ruri least wants to know: that she is actually a man. Ruri's weakness is discovered by the vice principal, and from that day on, he treats her like a toy. Taking advantage of the fact that Ruri cannot resist, he orders her to do various erotic things. At first, Ruri is forced to do them reluctantly, but gradually her body responds despite her feelings, and once she accepts the pleasure, she falls deeper and deeper into the swamp of pleasure. And so, Ruri, who is supposed to be a sadist, turns into an obedient masochist.