Adored by teachers and students alike, Himekawa is the smart and beautiful student council president of a prestigious cram school. In truth, however, she is a closet pervert with an erotic mind. For better or worse, the dubious teacher Sakuma ends up discovering Himekawa's true nature, taking advantage of her unquenchable lust to "train" her to become the perfect student... by his standards anyway. [Written by MAL Rewrite]