Asuma is an amnesiac who was guided by the talking owl Poritan to the town of Hisuigaoka, which was rife with phantom thieves. After many twists and turns, he ended up joining a group of phantom thieves who were normal students by day, but operated during the night. One day, the school principal Uta, who was also one of their clients, asked them to steal the emotional energy (FCP – Fragment Component Partes) which was being used for evil deeds. He had the feeling that excitement lies ahead in his future, but also felt a tinge of nostalgia. “It’ll be the key to regaining your memories.”