Star Rail

The Astral Express, a train that transcended the boundaries of reality, hummed quietly as it streaked through space.

In one of its compartments, Shirou Emiya sat, his eyes reflecting the flickering lights that danced outside the windows of the Astral Express.

He had thought that after helping this dimension's earth with Honkai, he would be free to move on to the next.

But as fate would have it, his meeting with peculiar individual named Acheron had led him to explore the universe in ways he never imagined.

Acheron's navigation skill were worse than his sense of self preservation.

Shirou had agreed to help her, so here he was. It took multiple detours but eventually they ran into the nameless.

Of course, along the way, he had met and helped various beings from different planets, each with their own peculiar problems and fascinating stories.