The first story is the best one in this whole series. It follows Nicolas, a centuries old demon searching for his reincarnated first love who just happens to be a regular salaryman named Daegun, however Daegun has no memories of his past life. They start growing closer as they live together (Nicolas simply refused to leave) and find comfort in each other. It's really sweet and nice! Unfortunately the next two stories do not maintain that dynamic. They are much harsher relationships and not as easy to read. The second story is probably the worst imo especially with the ending. I don't even want to talk about the second one fr . Uhm so yea the first story is the best and I love it!