Hardened hit man Juzo Ogami's in for the mission of his esteemed career...life as an average middle school student!

Juzo Ogami has never led a normal life. He was picked up by a criminal organization as a child and grew up to become a legendary hit man. But everything changes when he's bitten by a mysterious insect and becomes a teenager again! Can this battle-hardened assassin handle the rigors of middle school life?!

After a summer vacation that includes a camping trip and the home ec club trying to sell Ogami and Noren as a more believable couple, the kids begin their second term...only for Ogami to discover that the new principal is his nemesis Yoichiro Oka. And as if that's not enough, a new Mitsuoka challenge is waiting in the wings!