Gun x Clover

GUN×CLOVER (ガン×クローバー) is a manga written by Yamaguchi Mikoto and illustrated by D.P. It is published by Monthly Dragon Age Manga.

Plot
Mikado High School trains the best students to be the best mercenary bodyguards. But Morito Hayama, a merc escort student with no rank whatsoever, is suddenly assigned to guard a person so highly valued that no escort has ever survived before. Will his subject survive the experience? Will HE survive?!