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KILL BLUE

キルアオ

7.3/10(AniList score)202612 eps24 minJA

Action Comedy#action-comedy#age-regression#assassin-protagonist#fish-out-of-water#forced-infiltration

Legendary hitman Juuzou Oogami's life is turned upside down when a mysterious wasp's sting transforms him into a 13-year-old boy. Chaos erupts as he navigates middle school. If you love dark humor and action, this is unmissable.

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)

Editorial mood guide by WatchMoodly Editorial Team · Base catalog metadata via AniList.

7.3/10 avg

Studio: CUE

Mood Rationale & Viewing Guide: Should You Watch KILL BLUE?

🤣funny Mood 😄happy Mood 🤩excited Mood

Within our mood classification system, KILL BLUE aligns strongest with a funny / happy / excited viewing mood (pure comedy to make you laugh until it hurts). Key tonal signals include action comedy, age regression, assassin protagonist, fish out of water, forced infiltration, funny moments, making it a strong pick when you want a story driven by those themes without spoilers.

Watch If…

•You want a action, comedy anime series released in 2026 from CUE.
•You enjoy themes centered on action comedy, age regression, assassin protagonist, fish out of water.
•You want a compact 12-episode run you can finish in a weekend (~24 min per episode).

Skip If…

•You prefer high-intensity, gritty psychological thrillers over action and comedy storytelling.
•You only watch completed stories and prefer not to wait for upcoming episodes.

Official Trailer

Official Streaming Platforms

Netflixlegal Prime Videolegal Crunchyrolllegal Vikilegal

Frequently Asked Questions About KILL BLUE

Where can I watch KILL BLUE (2026) legally online?

KILL BLUE is available through official platforms including Netflix, Prime Video, Crunchyroll, Viki. Use the streaming links on this page to open the licensed release directly.

What mood and genres does KILL BLUE fit best?

KILL BLUE is classified under Action, Comedy and best matches a funny or happy or excited mood, featuring elements of action comedy, age regression, assassin protagonist, fish out of water, forced infiltration.