Aria the Scarlet Ammo Special

Tokyo Butei High School is a special institution that trains armed detectives, known as Butei, in the use of firearms and combat skills. Student Kinji Tooyama, in his second year, possesses a secret ability he keeps hidden to lead a quiet life. His ordinary existence is disrupted when a bombing occurs near his school, and he crosses paths with H. Aria Kanzaki, a top student from the Assault Studies department, who holds the highest S-Rank in the school.