Make sure you have Node v20 or later. Clone the repo and run npm ci to install dependencies. Inside each theme source directory, there is a per-component directory containing the respective styles.

Bocchi the Rock! (TV): Insert Song Performance (as Kessoku Band; "Guitar to Kodoku to Aoi Hoshi" eps 5, 8, "Ano Band" ep 8; as Kessoku Band; "Wasurete Yaranai" ep 12, "Seiza ni Naretara" ep 12 ...