A children's choir singing about sound itself, animated into something that feels less like a music video and more like watching a door open into a room you didn't know you needed. The song moves through the world with the kind of quiet curiosity that only works when you're not trying to impress anyone. Nakahara's animation never reaches for spectacle; it just lets the music breathe, and that restraint is exactly what makes it stay with you.

Oto no Symphony is a single-episode music video built around the song of the same name, sung by the NHK Tokyo Children's Choir, known in Japanese as NHK Tokyo Jidou Gasshoudan. The piece appeared on Minna no Uta, a program from the Japanese broadcaster NHK. Shuuichi Nakahara handled the animation, setting his visuals to the choir's performance.