Shiraki Tsutomu

Student of Nanako. He lives with his grandfather after losing parents from young age. By digging up grandfather's memento, he finds out his grandfather used to be member of evil organization which was destroyed by a group of bishoujo named "Justice Pirates" long time ago. When watching the old recorded footage of their battles, he falls in love with Sapphire who is member of "Justice Pirates". The thoughts is so strong that he decides to make Sapphire his own after knowing Sapphire is actually also his beloved teacher Nanako through an accident.