The dreams were more reflective of their feelings and was indirectly addressed with their choices. First, Howon became aware of Jinhyung even if he was romantically inclined towards Chanwoo.
Second, Jinhyung saw Howon crying and in a way, it foreshadowed Chanwoo's rejection of Howon. When Howon went for him, Jinhyung wanted to kiss him but he wakes up. And it made him approach Howon and dort his feelings too.
Third, Chanwoo's aggressive feelings that led to a rape scenario made him choose to stay farther away from Howon after that subtle closure when they were listening to music. (he was like a third party for Howon's affection but he unknowingly rejected Howon and Jinhyung was already taking Howon's affection right after)
Last, without having to mention the dream, Howon already fell in love with Jinhyung's simple-mindedness and assertive behavior. They don't even mention the dream anymore because reality addressed the impact of the dreams.
Somehow it satisfied me however the dreams that were the main point of the plot were ignored later on.. I expected it at the last moment that the uke will say something about those dreams had led them to what they are right now or something like that. I expected the glasses guy to be linked into something like a love triangle but it seems like the story was cut short (not complaining tho). either way the ending was heart warming, since it's always so refreshing to see an innocent and honest seme and beautiful uke.