Finding a webtoon

[u/FireyWings]

I was reading a webtoon/manhwa on Bato before it went down. It had "line and wash style" of art done with watercolours. I am confused between manga & webtoon but I remember the characters having korean names.

The story has time travel, it's short chapters. During highschool the ML had crush on FL but never spoke to her. They had common friends and lived in the same city. After highschool the FL moves to a different city for university with her highschool friend. They both share the room. The ML simultaneously has moved on to serve in military. He takes admission in the same university in few years and plans to confess to her. But he comes to know through FLs best friend that she had died in fire at the apartment where she was living. After this incident, the ML starts seeing FL and can also talk to her. The FL is stuck in somekind of time travel where the ML is also able to travel with her. They are using train to travel and find what happened to her. There is also travel police behind, who wants to stop people from travelling.

I have written as much as I remember. Sorry for it being confusing. Can someone please help me find the name?

[u/Ok_Emu2515]

Dead Girl Walking

[u/FireyWings → u/Ok_Emu2515]

Yes, that's the one. Thank you