Life hasn't been fair to Koyomi Morishita. Even though she's in high school, she's so short that everyone assumes she's still in grade school. The boys and girls in her school tease her mercilessly, and she's not exactly graceful either. On the other hand, she's still better off than Yumiko, who has a magician trying to kill her. Or at least Koyomi was until their paths crossed!