Blue Box cover art

Blue Box

Ao no HakoアオのハコLa caja azulNiebieskie pudełko

2024 · ONA · 25 eps Finished

AniList average score
81%
On AniList users' lists
154,642

What is Blue Box about?

Blue Box is an ONA (an anime released online first) of 25 episodes animated by Telecom Animation Film, adapted from a manga. It aired from October 3, 2024 to March 20, 2025. AniList classifies it as romance, slice of life and sports.

Do these sports-crossed lovers have a chance?

Taiki Inomata loves badminton, but he has a long way to go before he can reach nationals. When Taiki sees upperclassman Chinatsu Kano practicing her heart out on the girls’ basketball team, he falls for her hard. After an unexpected turn of events brings the two closer together, sports might not be the first thing on their minds anymore!

(Source: TMS Anime)

Synopsis from AniList. The summary above it is written by FreeAnime.xyz from AniList's data.

Themes AniList users associate with it: Heterosexual, Primarily Teen Cast, School Club, Coming of Age, Athletics, Male Protagonist, Badminton, School, Female Protagonist, Cohabitation.

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Where to watch and learn more

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Streaming rights differ by country and change over time. A listed title page means AniList records it for this entry; it does not confirm the title is available in your region today.

Other official links listed on AniList

Official trailer on YouTube

Main characters

Characters AniList lists in a main role, with spoiler-free notes.

  • Chinatsu Kano 鹿野千夏

    Main character

    A first-year high school student and the rising star of Elmei Junior and Senior High's girls' basketball team. Her personality and skills have made her incredibly popular both inside and outside of her school, to the point where she's been featured in various magazines.

    Japanese voice: Reina Ueda

  • Taiki Inomata 猪股大喜

    Main character

    A third-year middle school student and a member of Eimei Junior and Senior High's boys' badminton team. While not the most-talented player, Taiki is nonetheless extremely hardworking. He very routinely goes to Eimei's gymnasium for morning open practice, sharing the floor with his crush, Chinatsu Kano. Taiki's strong…

    Japanese voice: Shouya Chiba

  • Hina Chouno 蝶野雛

    Main character

    A third-year middle school student and a member of Eimei Junior and Senior High's girls' rhythmic gymnastics team. The youngest daughter of a former representative of the Japanese gymnastics team, Hina is considered a prodigy in the sport among her peers, having ranked fourth among all junior high school students in…

    Japanese voice: Akari Kitou

Supporting characters

  • Kyou Kasahara 笠原匡

    Supporting character

    A third-year middle school student and a member of Elmei Junior and Senior High's boys' badminton team. He is friends with both Taiki Inomata and Hina Chono. In the Ao no Hako oneshot, Kyou is instead a member of his school's shogi club.

    Japanese voice: Chiaki Kobayashi

  • Kengo Haryuu 針生健吾

    Supporting character

    A second-year high school student and a member of Elmei Junior and Senior High's boys' badminton team. He placed third in the prefectural qualifiers for badminton, barely missing the mark to qualify for nationals.

    Japanese voice: Yuuma Uchida

  • Shuuji Yusa 遊佐柊仁

    Supporting character

    First-year student at Sajikawa High and a member of the Badminton Team. Older brother of Haruto.

    Japanese voice: Kenshou Ono

  • Shouta Hyoudou 兵藤将太

    Supporting character

    Third-year student at Sajikawa High and a member of the Badminton Team. He is a former National Champion. Badminton rival to Kengo Haryuu.

    Japanese voice: Yuuki Ono

  • Yukiko Inomata 猪股由紀子

    Supporting character

    Mother of Taiki Inomata

    Japanese voice: Ryouka Yuzuki

  • Nagisa Funami 船見渚

    Supporting character

    Second-year student at Eimei Senior High School and a member of the basketball team.

    Japanese voice: Anna Nagase

  • Ryousuke Nishida 西田諒介

    Supporting character

    Current captain of the Eimei Senior High badminton team.

    Japanese voice: Shougo Sakata

  • Chinatsu no Haha 千夏の母

    Supporting character

    Chinatsu Kano's mother. She had to live overseas for work so she contacted an old teammate, Yukiko Inomata, in order to let Chinatsu stay with the Inomata family.

    Japanese voice: Kaori Nazuka

  • Niina Shimazaki 島崎にいな

    Supporting character

    Nina Shimazaki is a friend of Hina Chono and is on the rhythmic gymnastics team.

    Japanese voice: Asaki Yuikawa

  • Taiki no Chichi 大喜の父

    Supporting character

    Taiki Inomata's Father

    Japanese voice: Hiroki Maeda

  • Taiki no Sofu 大喜の祖父

    Supporting character

    Taiki Inomata's grandfather.

    Japanese voice: Satoshi Miyazaki

  • Ichirou Kishishou 岸样一郎

    Supporting character

    Second-year high schooler at Shimotomi High and member of the Badminton Team. He was formerly doubles partners with Kengo Haryuu.

    Japanese voice: Kengo Kawanishi

Full cast list

Related works

Prequels, sequels, side stories and source material, as linked on AniList.

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