Satou Ichirou one time name himself ‘Maryuuin Kouga’ and act as if he be a hero in a fantasy universe. His unusual behaviour cause his schoolmate to strong-arm him and he leave the school. At his new school, he try to act like a normal boy, but one day he meet a miss who cosplays with a bluish ness. She name herself “a research worker travel from the outer universe to seek for the ‘firedrake terminus’”. At first, Ichirou reject the miss, Satou Ryouko, because her behavior remind him of his embarrass past times, but he change his head after see her get strong-arm. In order to convey Ryouko back to existent life, Ichirou accept her and his past times and get down the concluding conflict as Maryuuin Kouga.