Aria The Scarlet Ammo (Japanese: 緋弾のアリア, Hepburn: Hidan no Aria) is a Japanese light novel series written by Chūgaku Akamatsu and illustrated by Kobuichi. As of December 2018, 30 volumes have been published by Media Factory under their MF Bunko J label. A manga adaptation by Yoshino Koyoka started serialization in the seinen manga magazine Monthly Comic Alive on September 26, 2009. An anime adaptation aired between April and June 2011. An original video animation (OVA) episode was released on December 21, 2011. A spin-off manga titled Aria the Scarlet Ammo AA by Shogako Tachibana began serialization in Square Enix's Young Gangan magazine on November 5, 2010, with an anime adaptation by Doga Kobo airing from October 6, 2015.