Vacation Terminal

Gavriil and Yeva, two strangers who happened to meet by chance, both travelling together, on the same train, in the same cabin, but really with not much to talk about. But when their train derails in the middle of nowhere, they're suddenly forced to work together. Gavriil wakes up alone in a cold, pitch-black cave—his leg missing, and Yeva claiming she saved his life. There’s no sign of rescue. No way to call for help

...This was supposed to be just a short vacation.

[From itch.io]