I'm guessing the dog in the dream was actually Eungyo getting frisky irl while Sunwoo was asleep. And Eungyo decided to stay at the hotel because he can't control himself and is worried he'll hurt Sunwoo/the baby.
There is no way either of these characters is smart enough to pay a phone bill much less have a baby together. I don't even think therapy could save these guys. But I'm still reading after 37 chapters so I guess I'm the real dumbass.
I'm guessing the dog in the dream was actually Eungyo getting frisky irl while Sunwoo was asleep. And Eungyo decided to stay at the hotel because he can't control himself and is worried he'll hurt Sunwoo/the baby.
My exact thoughts