Parabellum

On his first day at Hinomiya Academy, transfer student Kuze Aoi finds himself staring down the barrel of a gun. His childhood friend Miyabi introduces him to the campus and its students, including the school’s prince and princess: the cool, beautiful Shitara Sagiri and the elegant, magnificent Hinomiya Kuon. After school, Aoi loses his way around campus. Kuon starts shooting at him, and a girl named Atarashi Sonoko saves him just in time. Aoi appears to hold a secret that is central to the feud between two old and powerful families.