Honkai: Star Rail: Becoming a Nameless and Chasing the Stars

Slow-paced + following the train's route + everyday life + one heroine

He couldn't remember his own name.

He only remembered a song and a stretch of starlight he'd once seen. When he woke up, he was on a train. A girl with pink hair was speaking, and a young man in black beside her was holding a gun. Beyond the window lay an endless sea of stars. They were waiting for him to wake up, then asked him, "What's your name?"

He thought for a moment and looked out the window.

"Chasing Stars."

A person who chases after the stars.

Star: "Chasing me?"