Sousuke Sagara isn't your typical high school student. He reads military enthusiast magazines; he responds to questions with "affirmative;" he brings grenades to school in his bag. Though everyone at school takes him for a hopeless military geek, Kaname Chidori thinks there might be something more to him. When their plane is hijacked in the middle of a field trip, Kaname's instincts will prove correct: Sousuke is an elite, mech-piloting mercenary... and he's here to protect her! (Source: J-Novel Club)

Full Metal Panic! Tanpenshuu was published digitally in English as Full Metal Panic! Short Stories by J-Novel Club from August 26, 2022 to December 15, 2023, and in print as 3-in-1 omnibus volumes since July 11, 2023.