I was the one who wrote about the lube, actually I thought he would use it with the first cream that Junghwi gave him... It is difficult to say what will happen next. But it seems to me that the author wants the brothers to be in a romantic relationship at the end, not only physical. If so, I wonder how he will be able to bring them closer. I thought that Woojin would stand up for his older brother when this drunken ajossi started yelling at him and he would see him in a different light, since his boyfriend decided not to get involved. But perhaps the author wants to bring them together at the end of the story.
I am going to call it from now...
He's gonna make Junghwi watch them do it, isn't he?
Please Wooyeon, fucking run away and report your stinky stepbrother