Tokyo Butei High School--- A special school where armed detectives, also known as "Butei", receive education as well as training. Kinji Tohyama, a sophomore, has a unique body that can initiate an ability called "hysteria mode" when it is stimulated a certain way. He tries to keep it a secret but all his dreams of living the life of an Average Joe get shattered when he becomes a victim of a bombing incident and meets Butei High "Assault" department elite, Aria H. Kanzaki.

Tokyo Butei High School, the specialized school renowned for training exemplary students to become world class buteis – military combative detectives with skills ranging from marksmanship, bomb detonation, and even supernatural abilities. Super elite S rank and top performing butei – Aria, and her chosen partner Kinji Tohyama, are assigned a new mission: to protect the SSR department’s star pupil, and Kinji’s dear childhood friend, Shirayuki, from Durandal, the same mysterious swordsman responsible for the imprisonment of Aria’s mother. Amongst the high tension of guarding against an invisible enemy, Shirayuki has a mission of her own: to rip apart Aria’s relationship with Kinji and steal him back! The thrilling, action packed saga and comedic love story continues in Aria the Scarlet Ammo Vol. 2. The dynamic duo take on new mission that leads them closer to the enemy responsible for framing Aria’s mother, but can their partnership hold up against the love triangle tensions with Shirayuki? The game is afoot once again in Akamatsu’s sequel of the scarlet ammo.

Kinji Tohyama can’t seem to catch a break. As a Butei (an armed detective) he’s constantly running away from assassins and polishing up his detective skills, all while attempting to have a normal high school life. Just when he thinks he’s finally going to get out… A gun toting, sword swinging, aggressive, small-breasted, pigtail haired beauty named Aria H. Kanzaki violently drags him back in! We know that our hero can dodge bombs and bullets, but can he dodge Aria’s demand that he becomes her slave? Or will she finally follow through on her threats to “blow him a new hole”?! Find out here in this action-packed volume!

The classic apocalyptic novel that stunned the world.