Horrified to learn that her precocious brother Soma is dating school bully Akari, Sara's peaceful matriculation soon becomes chaotic as new enemies...

Sara is the protector of her brother Soma. In order to keep Soma's feelings from being hurt, Sara must face six rivals.

A week after the events of the first film, a new girl arrives. She appears kind but this soon proves to be a form of persuasion on her part.