Trying to find horror webtoon/manga/manhwa. Does anyone know what the name is?

A year or two ago I saw a couple panels that were reposted on tik tok where this guy was on this rope and he was climbing it to idk escape. Anyways there was an opening on the roof where the rope led to and at the bottom of the rope I think they're were bodies? Skeletons? Im not too sure. While he's climbing this inhuman thing starts climbing too and he freaks out. Turned out the thing was actually human and he? She? They handed the guy they're phone. They gave it to him because they wrote a letter to their family on their notes app. The guy said "you can give it to them yourself" or something.

And the other person said "I don't want them to see me like this." And they hurled themselves off the rope and died. I think. Anyways that's all the panels I remember. I guess my memory is still good