Meet Juuzou Oogami, a legendary assassin who has never failed a mission. But his life takes an unexpected turn when, after eliminating a dangerous organization, he is stung by a mysterious wasp. Upon waking, the once fearsome 39-year-old killer has transformed into an innocent 13-year-old boy.
Still baffled by what has happened, his boss gives him a new order: “Enroll him in a middle school as if he were this child.” Now Juuzou faces a school life filled with mischievous classmates, immaturity, and constant danger. Can Juuzou grow up again? Or will other assassins find him, and will his second life end before it even begins?
