Voice actor Yuki Kaji is joining the voice cast of the ongoing Blue Box TV anime series as student Kazuma Matsuoka. The anime’s first cour began airing in Japan on October 3, 2024, with the second cour debuting on January 2, 2025. A total of 25 episodes will be broadcasted, with Netflix streaming the series weekly worldwide.
Matsuoka is described as a student who returned to Japan after studying abroad in America for a period of time.


Yuichiro Yano (Lupin the 3rd Part 5) is directing the anime series, with Yuko Kakihara (The Apothecary Diaries) as series screenwriter, Miho Tanino (Blue Thermal) as character designer and Takashi Omama (The Gene of Ai) as music composer. Telecom Animation Film is handling the animation production.
Meanwhile, the anime’s main voice cast includes:
- • Shoya Chiba as Taiki Inomata
- • Reina Ueda as Chinatsu Kano
- • Akari Kito as Hina Chono
- • Chiaki Kobayashi as Kyo Kasahara
- • Yuma Uchida as Kengo Haryu
The anime adaptation is based on the manga series by Kouji Miura, which began serialization in Shueisha’s Weekly Shonen Jump on April 12, 2021. Eighteen tankobon volumes have been released as of December 2024, with a 19th volume set for release on March 4, 2025. The manga was first released as a 2020 one-shot title.

Viz Media releases the Blue Box manga series in English, which describes the main synopsis as:
Taiki admires Chinatsu from afar, but he doubts that she sees him in the same way. Yet somehow, he musters up the courage to tell her to never give up on her dreams! After such a bold declaration, will Taiki’s fleeting high school romance finally begin?