Kill Blue

Adult Hitman, Ichiro Wanibuchi, is turned back into a child after a mysterious bee stings him. Seeing this as an opportunity, Wanibuchi starts going to middle school to live the childhood he never had. But when his mean classmate, Sakura Fuwa, is kidnapped, Wanibuchi must return to his life of crime to rescue her. This oneshot would lead to the creation of Kill Blue, published in Weekly Shonen Jump in 2023.