Yamada Ryu, a second year student who attends the prestigious Suzaku Private High School, is a problem child who comes to school late and leaves early, is prone to fighting all over the place, and even nods off in class. One day, he falls down the stairs with the honor student Shiraishi Urara. They faint, and when he wakes up in the infirmary he's turned into her!

Yamada must get all the witches together to conduct the seven witches' ceremony, and the last three needed are Urara, Mikoto, and Rika. Hoping to at least save Urara, Yamada heads for Mikoto's house along with the student council president Miyamura, but they're stopped by Miyamura's sister Leona.