p Akari Mamiya is an Rank E freshman who looks up to her seniorthe S ranked Aria HKanzakiThey both attend Tokyo Butei High Schoola school that trains its students as Armed Detectives otherwise known asldquo Butei rdquoto societyIndividual student training asidethe school employs the co operativeldquo Amica rdquosystemallowing an underclassman to train alongside an upperclassmanAkari is determined to be paired with Aria p