Full Metal Panic!
Synopsis
A sergeant by the name of Sousuke Sagara is assigned an important task. That of guarding high school girl Chidori Kaname. Sousuke is a military genius, gaining high rank at an early age, but because of his strange upbringing, he lacks social skill. Now, he finds himself as a fish out of water as he attempts to protect a girl from an evil organization and turn in his school work on time. (Source: ANN)
Background
Full Metal Panic! was published in English by ADV Manga from November 10, 2003 to April 11, 2006.