They aren't compatible

I thought this at first too, but if this is the real Heewon, then they might be. If he can actually relieve his stress like this, they might be really compatible.
At first, it didn't seem like Heewon was having fun at all since he was always stressed. Let's see if he's actually happy and relaxed after this. If he is, then they should stay together. If he's pissed that he has to go this far afterward, then they're not compatible.