Songs & musicBlue Box Season 2
Blue Box Season 2 names aiko for opening and Elsewhere Kikō for ending
aiko performs the opening, while Elsewhere Kikō, whose song “Koiiro” appeared in Season 1, performs the ending. Both acts shared what they put into their Season 2 songs.
animecca editorsUpdated October 24, 2026
aiko’s song accompanies a new season for Taiki and Chinatsu. The official TMS Anime channel released the main trailer for Blue Box Season 2 on August 26. That day, the official site announced aiko’s “Anata no Hana no Iro” as the opening and Elsewhere Kikō’s “blue in” as the ending.
What the songs mean to the artists
aiko recalled that school and her own room were her whole world as a student. Laughing with friends and throwing away a letter to someone she liked the next day are still precious parts of who she is.
Now that I’m an adult, I was able to put those feelings from back then into words in this song.
Elsewhere Kikō vocalist Sō Annō worked on the series before, singing “Koiiro” in Season 1 episode 24 at the request of composer Takashi Ōmama. This time the duo wrote a new ending, valuing direct longing and feelings too uncertain for words.
Staff and cast
Daisuke Sakō directs Season 2; Yūko Kakihara handles series composition and scripts, and Electric Circus produces the animation. Shōya Chiba voices Taiki Inomata, and Reina Ueda voices Chinatsu Kano. The anime adapts Kōji Miura’s manga, serialized in Weekly Shōnen Jump from April 2021 to July 2026.
Where to watch
Broadcast begins Sunday, October 4 at 4:30 p.m. across 28 TBS network stations. The premiere is episode 26 overall, “Déjà Vu.” Streaming services add episodes from 5:00 p.m. each Sunday.
Season 1 (autumn 2024, 25 episodes) was available on d Anime Store, Prime Video, ABEMA, U-NEXT, Hulu, DMM TV, FOD, Disney+, and Netflix as of animecca’s October 1 check. There is time to revisit it before Sunday evening.
Video page
Official YouTube video
