This seems adorable enough...even though i have no idea what it means...
What Donghae & Siwon said at the end:
Donghae,"werent you here to find your girlfriend?" Siwon,"i found her.. but i can never see her again. meeting someone is happiness.when or where you meet someone no matter what the results are... that is all happiness" (But that seems sad...)
One will never realise how much something means to them until they lose it...