The story revolves around an ordinary Japanese high school student named Futaro Uesugi. He is struggling with financial difficulties while studying in his senior year. In order to earn some extra money, the teenager decides to become a tutor. His first students turn out to be five classmates who are also identical twins. They dislike studying and can be expelled at any moment. The main character doesn't even dream of turning them into model students yet; first, he needs to win the girls over.