CUE · Spring 2026
Finished TV Synopsis 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 midd…
Also known as คิลบลู · Убивая юность
Guns91% School90% Age Regression88% Assassins85% Shounen83% School Club79% Urban79% Primarily Child Cast76% Ensemble Cast75% Surreal Comedy72%
⚠ 2 spoiler tags - click to reveal Fake Relationship Age Gap
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This series has finished airing — Jun 2026.
Characters & Voice Actors All16 Main1 Supporting14 Background1
Yuuko Sanpei
三瓶由布子
Japanese Shuuichirou Umeda
梅田修一朗
Japanese Takeo Ootsuka
大塚剛央
Japanese Atsumi Tanezaki
種﨑敦美
Japanese Reiji Kawashima
川島零士
Japanese Daisuke Sakuma
佐久間大介
Japanese Yumi Uchiyama
内山夕実
Japanese Show all 16 characters Staff Tadatoshi Fujimaki
Original Creator
Gakuto Gonbei
Art Director
Shinya Matsui
Director of Photography
Shouji Hata
Sound Director
Hiro Kaburagi
Series Composition
Miho Daidouji
Character Design
Yoshinori Horikawa
Color Design
Ratings Average 7.4 / 10
Mean 74%
Popularity #42,398
Favourites 724
Score Distribution
10 20 30 40 50 60 70 80 90 100
User Activity 42,398 total users
highest rated #52
most popular #43
highest rated #20 SPRING 2026
most popular #18 SPRING 2026
Details Format TV Series
Status Finished Airing
Episodes 12 episodes
Duration 24 min per episode
Aired Spring 2026
Season Number Season 1
Aired Apr 2026 – Jun 2026
Source Manga
Country JP
Hashtag #キルアオ #KillBlue
Studio CUE
Producers DMM.com, TV Tokyo, Tokyu, Tokyu Agency, REMOW
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KILL BLUE — AnimeX
