Kyouka a young girl transferred to the ADA after leaving her old school. She left as she didn't want to stay there and wanted to stay with her big brother, Atsushi. Atsushi and Kyouka are siblings who were separated, one day while Atsushi accidentally wandered off he ended up at an orphanage, the orphanage thought he was another orphan and kept him there. At the same time, her parents kept her and cared for her until they died from an assassination and now Kyouka lived with Kouyou. Kenji a very cheerful boy instantly befriends Kyouka and the two develop feelings over time. (I wanted to make a book about these two as 1. There isn't much of it and 2. It's cute)