Well I've understand they made BAD ROMANCE before TOGETHER WITH ME they missed out a few details.
What TOGETHER WITH ME portrayed they fight so hard for the relationship just to only be apart in BAD ROMANCE and too much story's going on i see knock and korn 80 % less in the series, and they have a main role in bad romance like where are they like for an hour and 17 minutes i only encounter they twice.

What they missed out in TOGETHER WITH ME

korn didn't know about the reaction knock has with shrimp in BAD ROMANCE he finds out during lunch when he was feeling knock..

yihwa wasent quite sure about knock and korn relationship. Until korn asked her to spy she at that moment she was sure then they were talking.

Cho meets Yihwa at the one year of knock and korn not at the gathering at the club in TOGETHER WITH ME .

i think clo should have being the one to replace yihwa in TOGETHER WITH ME for he was sure that korn was gay but she wasn't sure

Bad romance aint that bad but the missed a few details that was forgotten in TOGETHER WITH ME..