Summary Nightmare Building from Kainu Manga
Nightmare Building summary: Returning home after having his collegue slip something in his drink, he had a weird dream about having sex with a stranger. Hasung has made a new business contract and finds out it's the same guy from his dream... He ends up confused when he keeps having sex dreams and confronts Ren asking about who he is. Ren ends up being an incubus named "Nightmare."
