I'm speechless on the ending. I'm trying to think in a different way that Fate/red string was the antagonist of the story and it revolves around them hurdling past this problem. Donghwa already grasp the concept that even though they weren't fated they can still be together but Seunghyun had insecurities and them not being able to communicate it out pushed him to force tie them together but isnt that normal fighting for your love to be together. And the fact that they're are still together means Donghwa forgave him means he love him? Anyway the moral of the story is dont tie yourself up on so called fate.
Cut (Hogeol)