KILL BLUE

KILL BLUE is a twelve-episode action comedy that finished airing in spring 2026. The series follows Juuzou Oogami, a legendary hitman whose impossible streak of successful assassinations comes to an abrupt halt when a mysterious wasp transforms him from a fearsome 39-year-old into a 13-year-old boy. His boss's response is characteristically ruthless: infiltrate a middle school in his new form and continue taking assignments.

The premise sets up a collision between Oogami's deadly expertise and the ordinary chaos of adolescent school life. He must navigate colorful classmates, youthful drama, and the constant threat of assassins hunting him down, all while trapped in a child's body. The series balances its action foundation with comedy derived from the fish-out-of-water scenario of a seasoned professional forced to blend in among teenagers.

With its complete twelve-episode run now available, KILL BLUE is ready to watch in full. The story explores whether Oogami can find a way to reverse his transformation or if his enemies will catch up to him first, making survival itself the central question beneath the comedic premise.