Astral Express: Across the Multiverses (Honkai: Star Rail)

Original music and script, voice acting, and body acting! Pom Pom is always jealous of the trio being able to get out of the train. He takes his job seriously as a conductor and hasn’t left the train. He lives through the stories Stelle tells him. There have been rumors of Stellaron on other planets in different dimensions, a multiverse. As a surprise, Welt has been watching over Pom Pom secretly and learned to conduct the train himself. Reluctantly, Pom Pom agrees to go with the trio to explore the world for a little while. They see amazing worlds and experiences!