Hidan no Aria Special
The story is set in Tokyo Butei high school, where special schools are used to train armed detectives (or “Butei”) to use weapons. Kinji Tooyama, a second year student, has a special ability. He keeps it a secret in order to live an ordinary, peaceful existence. However, he is caught in a bombing while on his way to school and encounters H. Aria Kanzaki (the most powerful S-Rank Butei student studying Assault Studies).