Mao has just graduated middle school, and due to where she lives, she has to go to a different school from all her friends. While trying to find her new classroom, Mao stumbles upon a boy being bullied. She gets the bullies to go away, only to find that the boy, Riku, wasn't being bullied at all. Nonetheless, Riku respects her now, and refers to her as "Prince", for saving him. How will their relationship continue...?