Tokyo Butei High school--- It was a special school where armed detectives, also known as "Butei" are being brought up. Tohyama Kinji is a sophomore... more>> student who has the unique body which activates a "super mode" when it was stimulated by "something". He tries to hide it to others in order to live a peaceful life. But trouble came to find him when he became a victim of a bombing incident, where he met the Butei high "Assault" department elite, Aria H. Kanzaki. <<less

Akari Mamiya is an Rank E freshman who looks up to her senior, the S-ranked Aria H. Kanzaki. They both attend Tokyo Butei High School,... more>> a school that trains its students as Armed Detectives otherwise known as "Butei" to society. Individual student training aside, the school employs the co-operative "Amica" system, allowing an underclassman to train alongside an upperclassman. Akari is determined to be paired with Aria. <<less