Parabellum – Manga

on the very first day that kuze aoi transferred to hinomiya academy, he finds himself facing down the barrel of a gun. he is introduced to the campus and the student body by his childhood friend miyabi and learns about the prince and princess among students, shitara sagiri and hinomiya kuon. sagiri is a cool and beautiful while kuon is elegant and magnificent. after school, aoi gets lost on campus and kuon begins shooting at him and he's barely saved by a random girl named atarashi sonoko. it seems that aoi holds a secret that is critical in a feud between two old, powerful families.