Most High Ryudo Carether seeks to become the best basketball player of Japan! He chose a previously famous basketball high school to bring it to a new glory. He also does not like girls, as the girl won it in basketball in elementary school. There is also another new star player who joins the basketball team, Ichinomiya Chiaki. Nevertheless, Chiaki was ace in the women's basketball team of high school. She becomes a man when it is on the basketball court, and was excluded from the women's basketball team when its feature reveals. Ryudo reveals his secret and reluctantly becomes its ally and room service!