A military black-ops operative trying to pass as a normal high school student is already a premise that writes comedy gold for one episode. Fumoffu takes that premise, throws out the dramatic spine of the franchise, and commits fully to the bit for twelve episodes straight. Sousuke's complete inability to read social situations collides with perfectly mundane school life in ways that feel both impossibly absurd and weirdly grounded. The show knows its job is to make you laugh at the gap between how seriously Sousuke takes everything and how little any of it actually matters. It never overexplains the joke or apologizes for the stupid. That's the entire appeal, and it works.
Sousuke Sagara is a soldier trained to kill, not fit in at high school. Yet here he is, sitting in Jindai High beside Kaname Chidori, a girl who somehow discovered his secret military background and decided to keep it. Their relationship is volatile: she yells, he responds with tactical jargon and occasionally pulls weapons. Normal teenagers don't operate this way. When trouble finds Kaname, Sousuke's solution is predictably extreme. He becomes Bonta-kun, a deranged mascot character armed to the teeth, waddling through town in fuzzy combat readiness. The disguise is absurd. It barely works. Then Teletha Testarossa, Sousuke's commanding officer, decides she needs a vacation and enrolls at their school, making everything exponentially worse. Fumoffu abandons the military drama of its predecessor for pure comedic chaos. Sousuke brings military paranoia and overkill responses to everyday high school situations. Kaname counters with exasperation and violence. The result is a show that finds humor in the collision between soldiers and school life, where the most dangerous thing on campus might be a boy who sees every problem as a tactical objective.