Banji is a male juvenile delinquent who goes to an all girl's school and he also happens to be a pervert, his chromosomes also don't match. But Banji's parents want him to go to a good school but don't want to spend the money to go to a co-ed school. Now, in addition to learning subjects such as Math ad Science, he must learn how to put on a bra and make-up. He must also hide his identity from the cute girl who has stolen his heart and from the female bullies who want to expose his secret in in the locker room.