Seita is a high school student. One day, he has a bad cold and is hospitalized. He overhears the fact that he is dying. He runs away from the hospital in desperation and sneaks into a school where a school festival is taken place. He wants to have a sex with as many girls as possible before dying to leave a proof of his life. "Listen! I will occupy this school festival!!". The school festival of me, by me, for me has started....