Kyo Aizawa expected the cute Seisyu High girls' uniform and got a boy's one in the mail instead. Her father, whose own basketball career ended when he tore his Achilles tendon, has enrolled her as a male student so she can carry his dream onto the school's elite boys' team. Living as a boy also means the boys' dorm, where her roommate turns out to be Chiharu Eniwa, one of Seisyu's best players and most popular students, who has no idea she is a girl.