Responses

well idk how low your standards for one night stands are, but usually that's helping out after sex.
But if you're talking about how DG washed Jiwon as proof of love, everyone knows DG loves Jiwon and Jiwon loves DG but won't admit even without the washing, so idk what's the point you're trying to argue here, really.
It's a sex relationship, DG knew what he was getting into. However, he started having feelings for Jiwon, and while I like that he doesn't hold Jiwon to promises he didn't make and recognizes his feelings are his own, I think he should break the relationship up for his own sake.
As for Jiwon, even if it's a sex relationship, he's too mean to DG. No strings attached doesn't mean hurtful. There should be respect between the parties involved.
The best thing Jiwon could have done when he started suspecting DG had feelings for him was to break up the relationship, or at least talk honestly with DG. It may sound like he's taking the choice from DG, but it would prevent a lot of harm from being done.
But not only he stays on the relationship, he decides to be mean to DG and ignore him, but keep on having sex with him. That's not a respectful relationship.
Now, we all know why Jiwon behaves the way he does. Old heartbreak, possible trauma from a failed relationship, all that jazz. I understand why he doesn't talk to DG and keeps him at arm's length. And, in this situation, he can take advantage of a moral loophole because he never made promises to DG and his only fault is being mean to him (and taking advantage of DG's feelings, but again, moral loophole).
That's why I think it should be DG to break it up, for his own sake. Jiwon is not ready for nor does he want a relationship, the current situation is really comfortable to him, he won't break it up. I think that would empower DG in the relationship, show Jiwon he's not the only one dealing the cards. And maybe that will help him to get his head out of his ass.