The pitch alone is the joke: the Demon King spent his second life as a couch-rotting NEET, and his idea of character growth is becoming a teacher, only to find his homeroom roster includes Meteor Hanaori, the Hero who once ran him through. That's the engine, Ryuusei standing at a chalkboard trying to look authoritative while the woman who ended his reign is now asking him to grade her homework. The comedy leans hard into that power-reversal awkwardness, him flinching every time she raises her hand, her clearly still itching for round two. Underneath the bickering the show keeps dropping in a score that actually sells the swoony beats, so when Hanaori's old hero theme sneaks back in during a quiet hallway scene, it lands like a gut-punch nobody asked for. It's dumb, it's horny for nostalgia, and it knows exactly what kind of rematch it's building toward.

Ryuusei Narukami was once a Demon King in another world, but in his second life he is a NEET who stays shut in his room playing video games. His lazy new existence gets turned upside down when Meteor Hanaori, the Hero who struck him down, turns up reborn as an ordinary high school girl. Resolving to change his ways, Ryuusei rejoins society as a teacher, only to land a job at the very school she attends. Their stormy reunion stirs up old history between the former enemies and kindles an unexpected romance, leaving Ryuusei to wonder whether he is doomed to keep fighting her in this life too. The result is a supernatural romantic comedy built on a rivalry that carries over from one world to the next.