Full Metal Panic! - Gatou, Shouji Shiki, Douji

Jindai High School was a relatively safe place, right up until Sousuke Sagara transferred there. A total nut, he wreaks havoc on the school's student body and gets into a world of trouble with the teachers! But there's more to Sousuke than meets the eye—not just a hell-raising student, he's actually a member of an elite military unit, on an undercover mission to protect the beautiful schoolgirl Kaname Chidori from the KGB.

(Source: TokyoPop)

Full Metal Panic! was published in English by TokyoPop from September 11, 2007 to February 1, 2011. 5 volumes were released before publication was discontinued. The fourth TokyoPop volume is a compilation of the original fourth and fifth. The series has been published digitally in English by J-Novel Club from May 4, 2019 to June 25, 2021, and in print as 3-in-1 omnibus volumes from February 4, 2020 to July 19, 2022.

The series got 1st place on the Kono Light Novel ga Sugoi! ranking under Best Light Novel category in 2008.