Aria is a volatile girl who’s top dog in assault at a school for young mercenaries. When she discovers her classmate Kinji’s an ace, she strong-arms him into being her partner, but she isn’t the only femme fatale who wants a taste of his combat skills. His secret? He’s only a hotshot when he’s turned on! Aria gets Kinji for one mission, but he’ll end up with more than one finger on his trigger!
Aria shows her cute side when she follows Kinji to the arcade after school. Later, when a bus full of Butei High students is hijacked, Aria calls on Kinji to team up with her to save their classmates.