Hikawa Nanako

Homeroom teacher in charge of Tsutomu's class. She is very popular among students because of her friendly and caring personality. However, behind the scenes, in the name of Sapphire, she used to fight against evil organization as member of a group of bishoujo named "Justice Pirates". After succeeding in protecting peace, she returns to normal life and marries her beloved husband Katsuharu. Little did she know the legacy of evil would come back to make her life never be the same again.