Adrena

"Adrena"
Hana-Kimi protagonist Mizuki Ashiya flying alongside various objects against a green background
Single by Yoasobi
from the EP The Book For,
Language
  • Japanese
  • English
A-side"Baby"
ReleasedJanuary 4, 2026
GenrePop
Length3:05
Label
SongwriterAyase
ProducerAyase
Yoasobi singles chronology
"Gekijō"
(2025)		 "Adrena"
(2026)		 "Baby"
(2026)
Music video
"Adrena" on YouTube
English version on YouTube

"Adrena" (Japanese: アドレナ, Hepburn: Adorena) is a song by Japanese duo Yoasobi from their fourth EP, The Book For, (2026). It was released as a single on January 4, 2026, through Echoes and Sony Music Entertainment Japan. The song serves as the opening theme for the 2026 anime series Hana-Kimi, and was based on Fuyu Tsuyama's short story Magical.

Background and release

Aniplex first announced an anime adaptation of the manga series Hana-Kimi in May 2024. On September 14, 2025, at Aniplex Online Fest 2025, it was announced that Yoasobi would perform opening and ending themes for the anime series, set to premiere in January 2026. On November 8, the songs, alongside their titles—opening theme "Adrena" and ending theme "Baby"—and snippets, were revealed through the anime's promotional video.

On January 1, 2026, Yoasobi announced the release of "Adrena" for the next three days, the same day as the anime's premiere, via digital music and streaming platforms. Its cover artwork, illustrated by Naji Yanagida, features the anime protagonist Mizuki Ashiya. The limited double A-side CD single, alongside "Baby", was released on March 4, additionally containing the English, "anime edit", and instrumental versions of both songs. The English version was included on the duo's English-language EP, E-Side 4 (2026), while the original version on the duo's fourth Japanese-language EP, The Book For, (2026).

Composition and lyrics

Fuyu Tsuyama wrote the short story Magical specifically for "Adrena". Published on the Hana-Kimi anime's website on January 3, 2026, it depicts a prequel to Mizuki's feelings for her love interest, Izumi Sano, and her experiences at school since then. Lyrically, the song expresses the protagonist's exhilaration and confusion and "straightforward yet awkward" and unrelenting love, as she pursues her dream boy, driven by "up-tempo pop track with comical sound and dizzying electronic developments".

Music video

An accompanying music video for "Adrena" premiered on January 6, 2026. Directed by Tsuribu Tokyo, who previously handled Yoasobi's "Players" music video, the comical 3D-animated visual features characters from Hana-Kimi, including the protagonist, Mizuki, who runs, flies, and passes others amid a chaotic atmosphere. The English version's music video was uploaded on April 24.

Live performances

Yoasobi debuted the performance of "Adrena" at Pentatonic music festival on January 24, 2026, at Yokohama Buntai. The duo later performed the song at the 2026 Central Music & Entertainment Festival and the Music Stadium in April.

Track listing

  1. "Adrena" (アドレナ) – 3:05
  1. "Adrena" – 3:07
  2. "Baby" – 3:52
  3. "Adrena" (English version) – 3:07
  4. "Baby" (English version) – 3:52
  5. "Adrena" (anime edit) – 1:30
  6. "Baby" (anime edit) – 1:28
  7. "Adrena" (instrumental) – 3:07
  8. "Baby" (instrumental) – 3:52

Credits and personnel

Charts

Chart performance for "Adrena"
Chart (2026) Peak
position
Japan (Oricon)
with "Baby"		19
Japan Combined Singles (Oricon) 42
Japan Anime Singles (Oricon)
(with "Baby")		 9
Japan Hot 100 (Billboard) 24
Japan Hot Animation (Billboard Japan) 9

Release history

Release dates and formats for "Adrena"
Region Date Format Version Label Ref.
Various January 4, 2026 Original
Japan March 4, 2026 CD Limited (with "Baby")

References

  1. ↑ Pineda, Rafael Antonio (September 25, 2025). "Hisaya Nakajo's Hana-Kimi Shōjo Manga Gets Anime". Anime News Network. Retrieved January 4, 2026.
  2. ↑ YOASOBI、テレビアニメ『花ざかりの君たちへ』のOPとEDテーマ両方担当!「この作品に花を添えられるよう...」. Mapion (in Japanese). September 14, 2025. Retrieved January 4, 2026.
  3. ↑ YOASOBI、TVアニメ『花ざかりの君たちへ』OP&ED主題歌を担当. Cinema Life (in Japanese). September 13, 2025. Retrieved January 4, 2026.
  4. ↑ アニメ『花ざかりの君たちへ』神楽坂真言役は日野聡さんに決定! YOASOBIによるOPテーマ『アドレナ』とEDテーマ『BABY』の2曲を使用したPVが解禁. Pash! Plus (in Japanese). November 8, 2025. Retrieved January 4, 2026.
  5. ↑ 全ての「イケメンパラダイス」はここから始まった! 「花君」のまっすぐで不器用な恋心を描いたOP曲 YOASOBI 「アドレナ」配信決定!. Anime! Anime! (in Japanese). January 1, 2026. Retrieved January 4, 2026.
  6. ↑ YOASOBI、アニメ『花ざかりの君たちへ』主題歌「アドレナ」を配信リリース+アジア10大ドーム&スタジアムツアー国内スケジュール発表. Barks (in Japanese). January 1, 2026. Retrieved January 4, 2026.
  7. ↑ YOASOBI、TVアニメ"花ざかりの君たちへ"OP&EDテーマ『アドレナ / BABY』3/4 CDリリース決定。主人公 瑞稀の描き下ろしイラストが飾る特別アートボード仕様. Skream!. February 1, 2026. Retrieved February 1, 2026.
  8. ↑ YOASOBI 自身最大規模の北米ツアー「YOASOBI NORTH AMERICA TOUR 2026 "NEVER ENDING STORIES"」を8月より開催決定!. Entame Rush (in Japanese). April 15, 2026. Retrieved April 16, 2026.
  9. ↑ YOASOBI新作EP『THE BOOK for,』収録曲&店舗別購入者特典の絵柄公開! 初の北米ツアーのキービジュアルも解禁. The First Times (in Japanese). June 5, 2026. Retrieved June 5, 2026.
  10. ↑ YOASOBI、新曲「アドレナ」の原作小説『Magical』公開 楽曲配信リリースも. CDJournal (in Japanese). January 3, 2025. Retrieved January 4, 2025.
  11. ↑ YOASOBI、アニメ「花君」の主題歌「アドレナ」配信決定 アジアツアー日本5公演の日程発表. Music Natalie (in Japanese). January 1, 2025. Retrieved January 4, 2025.
  12. ↑ Mori, Tomoyuki; Ishii, Eriko (January 9, 2026). YOASOBI、乃木坂46、星街すいせい、Base Ball Bear、tuki.、離婚伝説......注目新譜6作をレビュー. Real Sound (in Japanese). Retrieved January 10, 2026.
  13. ↑ YOASOBI、 TVアニメ『花ざかりの君たちへ』のオープニングテーマ「アドレナ」MVを本日20時に公開. Pia (in Japanese). January 6, 2026. Retrieved January 6, 2026.
  14. ↑ YOASOBI 自身4作目の英語版EP『E-SIDE 4』を本日配信リリース! さらに、本日22時より3夜連続で英語版Music VideoをYouTubeプレミア公開決定!. PR Times (in Japanese). April 24, 2026. Retrieved April 27, 2026.
  15. ↑ 【ライブレポート】syudou主催『PENTATONIC』DAY1 : YOASOBI、すりぃらが集結。ボカロシーン発の盟友と刻んだ"現在地". The First Times (in Japanese). January 30, 2026. Retrieved January 30, 2026.
  16. ↑ 【ライブレポート】YOASOBI、キタニタツヤらが雨の中で見せた極上パフォーマンス! 『CENTRAL』2日目レポート. The First Times (in Japanese). April 6, 2026. Retrieved April 6, 2026.
  17. ↑ ONE OK ROCK、<THE MUSIC STADIUM 2026>でUVERworld・YOASOBIとの共演が実現. Barks (in Japanese). April 6, 2026. Retrieved April 6, 2026.
  18. ↑ "Song on Oricon News". Oricon News. Retrieved March 11, 2026.
  19. ↑ "Oricon Top 50 Combined Singles: 2026-01-19" (in Japanese). Oricon. Archived from the original on February 28, 2026. Retrieved March 18, 2026.
  20. ↑ "Oricon Top 20 Anime Singles: 2026-03-16" (in Japanese). Oricon. Archived from the original on March 18, 2026. Retrieved March 18, 2026.
  21. ↑ "Billboard Japan Hot 100 – Week of January 14, 2026". Billboard Japan (in Japanese). Retrieved January 14, 2026.
  22. ↑ "Billboard Japan Hot Animation – Week of January 14, 2026". Billboard Japan (in Japanese). Retrieved January 14, 2026.
  23. ↑ TVアニメ「花ざかりの君たちへ」主題歌となる新曲「アドレナ」を、アニメ初回放送日1/4(日)に配信リリース決定&ジャケット写真公開!. Yoasobi Official Website (in Japanese). January 4, 2026. Retrieved January 2, 2026.
  24. ↑ TVアニメ『花ざかりの君たちへ』オープニング&エンディングテーマ『アドレナ / BABY』完全生産限定盤CDが本日発売!. Yoasobi Official Website (in Japanese). March 4, 2026. Retrieved March 4, 2026.