SPOILER WARNING:
The video contains some heavy spoilers for Cocoon, Liz and the Blue Bird, and light spoilers for Dandadan and A Silent Voice.

It's a documentary showcasing the work of Kensuke Ushio, the composer behind the soundtracks for productions such as Dandadan, A Silent Voice, Liz and the Blue Bird, Chainsaw Man, Devilman: Crybaby, and Ping Pong the Animation. In this movie, we can see his creative process, philosophy, and watch as he tackles the challenges of composing music for the film Cocoon.