The manga Kill Blue (Kiru Ao) by author Tadatoshi Fujimaki had its anime adaptation announced this Sunday (31). A teaser visual was revealed.
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Therefore, the animation for Kill Blue (Kiru Ao) is being produced by Studio CUE and is scheduled for release in 2026.
Synopsis
The story follows Juzo Ogami , a 40-year-old assassin who works for the criminal organization ZOO , considered the group's elite killer. During a mission against criminals linked to the genetic manipulation company Mitsuoka Pharmaceuticals , Ogami is stung by a wasp that alters his DNA, causing his age to regress to that of when he was only 12 years old.
Unable to continue working as an assassin because of his childlike appearance, the head of ZOO gives him a new mission while they search for a cure: infiltrate a school where the boss's daughter intends to study and assess whether the place is safe. To everyone's surprise, Ogami—who never had a formal education—ends up discovering that he enjoys school life. Now, he must balance his routine as a student and as an assassin.
Amidst all this, Noren Mitsuoka , heiress to Mitsuoka Pharmaceuticals, also emerges, and she may hold the key to restoring Ogami to his true age.
Finally, Kill Blue was serialized in Weekly Shōnen Jump between April 2023 and September 2025, being compiled into ten tankōbon volumes by June 2025.
Source: Official Website