Kill Blue (2026): The World’s Deadliest Assassin Gets a Second Chance at Middle School | Cast, Plot, Release Date & Where to Watch

What happens when the most feared assassin in the underworld wakes up in the body of a middle schooler? That’s the wild premise of Kill Blue, the upcoming anime adaptation of Tadatoshi Fujimaki’s hit manga. Equal parts action thriller, dark comedy, and coming-of-age drama, this series reimagines the meaning of a second life—only with guns, gangsters, and homework.

🦂 A Sting That Changes Everything

Jūzō Ōgami is a legendary assassin at the peak of his power—cold, ruthless, and unstoppable. Known as the "Demon’s Left Hand," he has never failed a mission for the Z.O.O. crime syndicate. But one fateful night, while taking down a genetic manipulation company, he is stung by a mysterious wasp. When he wakes up, the once-fearsome 39-year-old hitman has been transformed into a 13-year-old boy.

From towering shadows of the underworld to the brightly lit halls of middle school, Ōgami is forced into an assignment unlike any other. His new mission? Infiltrate a school and watch over the daughter of the pharmaceutical empire that may hold the key to restoring his true self.

"One bullet was enough to end a life. But one sting? It gave me a new one."

🎒 From Assassin to Awkward Teen

The clash of identities is where Kill Blue truly shines. Ōgami has no formal education, yet as he navigates classrooms, cafeteria drama, and sports days, he unexpectedly begins to enjoy student life. He learns math problems are trickier than mob hits, and gym class can be more exhausting than a firefight.

But danger isn’t far behind—his enemies from the underworld haven’t forgotten him. Even as he learns to embrace friendship, laughter, and the thrill of being young again, assassins are closing in. The question remains: Will he ever return to his original form, or will middle school become his permanent battleground?

👤 Key Characters

• Jūzō Ōgami – The infamous hitman turned 13-year-old student. His deadly skills clash hilariously with his new school life.

• Noren Mitsuoka – The strong-willed daughter of Mitsuoka Pharmaceuticals. Initially distrustful, she becomes a key ally.

• Kotatsu Nekota – Ōgami’s quirky partner, a tech-savvy ally who provides gadgets and comic relief.

📚 From Manga to Anime

The Kill Blue manga debuted in Weekly Shōnen Jump in 2023 and concluded in 2025 with ten collected volumes. Known for its blend of high-octane action and schoolyard comedy, it quickly became a fan-favorite.

Now, studio CUE is bringing the world of Kill Blue to life in a 2026 anime adaptation. Directed by Hiro Kaburagi, with character designs by Miho Daidōji, the anime promises fluid action sequences, emotional depth, and the same razor-sharp humor that made the manga so addictive.

📺 Where to Watch

Kill Blue will premiere in 2026, streaming worldwide. Fans can expect it to be available on major anime streaming platforms after release, bringing Ōgami’s wild second life to a global audience.

🔫 Why Kill Blue Will Hit Hard

At its core, Kill Blue isn’t just about bullets and betrayal—it’s about redemption. Ōgami, a man who lived only for death, is forced to rediscover life in the most unexpected way. By trading in silencers for schoolbooks, he learns that sometimes, the greatest battles aren’t fought with guns, but with heart.

"A second life doesn’t mean fewer enemies. It means a chance to fight differently."

Kill Blue is set to be one of 2026’s most exciting anime premieres—a gripping mix of assassins, adolescence, and absurdity that asks: can a killer learn how to live?