Honkai Impact 3: Twilight Maiden Train

All the characters in the Honkai apocalypse setting are Xiang Tangwen. The story takes place during the Final Arrival and the post-Hong Kong period that followed. The Great Collapse destroyed civilization and froze day and night. When the girls woke up from their dormant cabins, all they saw was a train that never stopped and the illusory sun and moon rotating on the windows.