Jindai High School enjoyed a peaceful atmosphere until the arrival of Sousuke Sagaka, a troublemaker who disrupts the student community and clashes with the faculty. However, beneath his chaotic facade lies a secret: Sousuke is not just a rebellious student but a covert operative from an elite military group. His mission? To safeguard the lovely schoolgirl Kaname Chidori from the KGB's watchful eye.