These black-haired, top-achieving students are members of the student council, have excellent grades, and their only redeeming quality is their seriousness. One day, they are betrayed by a teacher and a male student they trusted, and are forced to have sex on campus! The actions gradually escalate, with the black-haired, loli schoolgirl being raped by her homeroom teacher in the bathroom and then having a foursome in the gym storeroom, and the actions are tormented and used as toys. The four top-achieving students feel a sense of pleasure even as they are raped, and have complicated feelings about them, but they decide to get revenge and reverse rape the male student!!