For those who are confused, last chapter was yoon's flashback about that time at the hotel where wonwoo saw him with that woman. And yoon carrying sleeping/drunk wonwoo was the time after he was done talking to that woman.
Chpt. 53: Yoon calls Jinwon and finds out Dung Se Eun is with Wonwoo. On his way there, we see a flashback to what happened the night Wonwoo “Spent” the night at Se Eun’s after Wonwoo saw him with the red hair girl.
Chpt. 54: present time, Yoon goes looking for Wonwoo.
For those who are confused, last chapter was yoon's flashback about that time at the hotel where wonwoo saw him with that woman. And yoon carrying sleeping/drunk wonwoo was the time after he was done talking to that woman.