If I had to guess why he did that, then I’d say the only thing he was thinking about was getting away from her. He wasn’t thinking about she felt. Since he didn’t apologize at the end or even feel guilty. If she hadn’t brought up couples, then he probably wouldn’t have cared. Either way it was...
I mean he’s doing it for fun. Something to spend his time on. Also to practice his Korean. Also for those impatient ones such as myself. Nothing I see to complain about.