Damn

Yeah....that was a dick move. I legit thought they were doing it...

I'm kinda relieved that wasn't their first time because I felt like the whole situation was off for them (particularly Sangwoo); I mean, I know he's unstable and all but I had a feeling he wasn't actually courting him due to his speech and the way the mangaka drew out the scene was peculiarly "careful".
Not gonna lie though, I did laugh like a jackass when Bum realized what's up; I do feel bad for him for embarrassing himself like that though.