KILL BLUE is a tV series anime that premiered in spring 2026, produced by CUE.

About the production: the story comes from a manga, there are 12 episodes of about 24 minutes and its current status is "finished".

Its main genres are action and comedy, with themes such as Guns, School, Age Regression and Assassins.

On AniList, KILL BLUE has an average score of 74%, a good score, and appears on 50,937 users' lists.

The franchise continues in or follows from: Kill Ao 2nd Season.

Juuzou Oogami is a legendary hitman who has never failed an assignment, no matter how impossible. One day, after wiping out a powerful organization, he is stung by a mysterious wasp and collapses. When he wakes up, the fearsome 39-year-old assassin has been transformed into a 13-year-old boy! Before he can even process what happened, his boss delivers a new order: “In that body, infiltrate a middle school.” What awaits him is an unexpected school life filled with colorful classmates, youthful chaos, and looming danger. Can Juuzou ever return to his original form? Or will the assassins closing in on him end his second life before it even begins!? (Source: Official Site)

Official synopsis from AniList.