The mafia boss of the Iwashi family is a high school student named Konomi Minoko. But don't let her appearance deceive you; she has done and seen things that ordinary people can't even imagine. Under her command are two assassins who have achieved legendary status through their determination and ability to complete any task. Ishikawa Rushia, codenamed Baret, uses a modified handgun with custom hollow-point bullets to blow up targets from within. Shirato Marin, codenamed Francesca, wields a weapon that is a combination of a throwing axe and a battle axe. Both are Minoko's high school classmates and appear to be ordinary teenagers but are among the most feared killers in the criminal world, handling assignments often involving other assassins and underground groups.