The cast consists mainly of young voice actors, in line with the concept of the JOCHUM characters of "chasing your dreams."
The JO1 idol group was formed during the Produce 101 Japan reality show in 2019. The band debuted in 2020, and Sanrio collaborated to create the JOCHUM characters in 2022. They have performed theme songs for The Seven Deadly Sins: Four Knights of the Apocalypse, Boruto: Naruto Next Generations, and Fanfare of Adolescence.