The staff of the TV anime adaptation of Tadatoshi Fujimaki’s KILL BLUE manga series has revealed the anime’s opening and ending theme songs. aespa performs the opening theme song “ATTITUDE,” and RIIZE performs the ending theme song “KILL SHOT.” The theme song artists for KILL BLUE also shared comments regarding their music.
“We’re excited to share that aespa has been selected as the opening theme artist for the anime KILL BLUE. The title of the song is ‘ATTITUDE’,” said aespa. “We believe the track perfectly matches the fast-paced energy of KILL BLUE. To everyone who’s looking forward to the series, we hope you enjoy the world of KILL BLUE together with our opening theme, ‘ATTITUDE’!”
“‘KILL SHOT’ is a track that captures the world of KILL BLUE, where ‘the front and the back’ and ‘the ordinary and the extraordinary’ intersect,” shared RIIZE. “Centered around a rock-inspired sound, the song features aggressive drum beats blended with breakbeats, creating a powerful impact. In the chorus, the melody expands emotionally, deepening the lingering impression of the story. We hope you enjoy the song along with the anime’s story.”
The KILL BLUE anime premieres in April 2026 on TV Tokyo and affiliate channels.
The cast of the anime includes:
- Shinsuke Takeuchi as protagonist Juzo Ogami in his adult form
- Yūko Sanpei as Juzo Ogami in his kid form
- Fūka Izumi as Noren Mitsuoka
- Shūichirō Umeda as Kotatsu Nekota
- Takeo Ōtsuka as Tenma Tendo
- Atsumi Tanezaki as Chisato Shiraishi
- Yumi Uchiyama as Eri Wanibuchi
- Daisuke Sakuma as Shin Kohazame
- Shoya Chiba as Kazuma Rindou
- Yoshiki Nakajima as Eiji Rindou
Hiro Kaburagi is the director of the KILL BLUE anime. What’s more, Miho Daidōji is the character designer, and CUE is producing the animation.
The KILL BLUE manga received a new novel adaptation, titled Kill Ao Secret Report (Kill Blue Secret Report), by Kiyoko Hoshi. The novel shipped on December 4, 2025 alongside the manga’s 13th and final compiled book volume. Shueisha serialized the KILL BLUE manga in Weekly Shonen Jump.
Lastly, here’s an overview of the series, via Shueisha:
A legendary assassin at 39. Starting over… as a middle schooler.
Jūzō Ōgami 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 Jūzō ever return to his original form? Or will the assassins closing in on him end his second life before it even begins!?
