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)

The first five volumes of Full Metal Panic! were published in English by TokyoPop from September 11, 2007, to February 1, 2011, before publication was discontinued. The fourth TokyoPop volume is a compilation of the original fourth and fifth. The series was 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 ranked first in the 2008 Kono Light Novel ga Sugoi! in the Best Light Novel category.