A new key visual, PV trailer, theme songs, and a new cast member have been revealed for the ongoing Blue Box TV anime series at the Jump Festa ‘25 event. The anime’s first cour aired in Japan on October 3, 2024 and will resume broadcasting on January 2, 2025 after a one-week holiday break.

An English-subtitled version was also released recently.
The trailer confirms the addition of voice actress Kana Ichinose as new character Ayame Moriya, who is Karen’s younger sister and the manager of the Eimei Senior High badminton squad.

The new main theme songs were also previewed in the trailer, which include the opening theme “Saraba” by Macaroni Empitsu and the ending theme “Contrast” by TOMOO.
Yuichiro Yano (Lupin the 3rd Part 5) is directing the anime, with Yuko Kakihara (The Apothecary Diaries) as series screenwriter and Miho Tanino (Blue Thermal) as character designer. Telecom Animation Film is in charge of 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
Netflix is streaming the anime weekly worldwide.
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. The manga first debuted as a 2020 one-shot title.

Viz Media releases the Blue Box manga series in English, which describing 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?
Source: Blue Box Official Anime Twitter