Aria the Scarlet Ammo

Welcome to Tokyo Butei Academy, a school that teaches basic high school classes. More than that however, it requires its students to carry guns and blades. The reason? It's because Butei students go on missions, making arrests, stopping criminals, etc. Besides basic HS classes, Butei students also learn combat skills, intel gathering, etc. The main character, Kinji Toyama, is picked up as a sidekick by Aria H. Kanzaki. Aria wants to use the amazing skills she is sure Kinji possesses to help her catch some criminals and do some quests. The thing is, Kinji is only a lowly E Rank Butei. He can't accomplish much of anything. Well...he does have some pretty amazing skills actually. He's an extraordinary Butei. There's a catch. Kinji has a medical condition. Kinji only turns from a wimp to something of a James Bond when he's turned on.