Gun x Clover

ガン×クローバー

Mikado High School trains its students as elite mercenary bodyguards, ranking them by skill. Morito Hayama, an unranked escort trainee, is abruptly assigned to protect Kotonoha Nanase — a charge so dangerous that every previous bodyguard has died. Posing as an ordinary student at her side, Morito hides that he is in fact one of the world's thirteen Master Rank mercenaries, and the gulf between his apparent rank and his real ability drives the early chapters.