seungeon said 'don't leave' and he said sorry because he probably will leave him i think :(
He is sorry because, as he said before, he sees an end to whatever they have now comming eventually, and soon. And seing Seungeon looking so happy and saying "please don' t leave me" made him councious of that again that's why he looks sad.
love this comment. i completely forgot that important scene. thanks
You are welcome ^-^
Wait why is he sorry?? Did I miss something (￣∇￣")