Aria the Scarlet Ammo is a tV series anime that premiered in spring 2011, produced by J.C.STAFF.

About the production: the story comes from a light novel, there are 12 episodes of about 24 minutes and its current status is "finished".

Its main genres are action, comedy, ecchi and romance, with themes such as Tsundere, Guns, School and Urban Fantasy.

On AniList, Aria the Scarlet Ammo has an average score of 63%, an average score, and appears on 75,832 users' lists.

The franchise continues in or follows from: Hidan no Aria - Butei ga Kitarite Onsen Kenshuu.

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! (Source: Crunchyroll)

Official synopsis from AniList.