Kill Blue

Kill Blue is a spirited action-comedy manga written and illustrated by Tadatoshi Fujimaki, creator of Kuroko's Basketball. The story follows Juzo Ogami, a legendary 39-year-old hitman working for an underworld organization. After being stung by a mysterious genetically engineered wasp during a mission, he finds his body reverted to that of a 13-year-old boy.

To find a cure and investigate the syndicate behind the transformation, Juzo must enroll in an elite middle school under cover. Despite possessing world-class assassination skills and decades of experience, he finds navigating modern teenage social dynamics, homework, and club activities far more challenging than his deadliest hit missions.

Fujimaki crafts a hilarious contrast between Juzo's inner middle-aged pragmatism and his outward juvenile appearance. The series balances energetic martial arts action with lighthearted situational humor as Juzo involuntarily bonds with his classmates and protects them from emerging underworld threats.

Blending slick combat paneling with engaging character rivalries, Kill Blue provides a fresh take on the school action genre. Readers will enjoy Juzo's unique perspective as he experiences the school life he never had while staying prepared for unexpected mercenary encounters.