은 거 괜찮다

are you okay with that?

A description in "-(으)ㄴ 거" plus 괜찮다 "be fine, be okay with". It checks whether something suits the other person before you commit: are you okay with spicy food, are you both okay with the tension being this high, is the dark lighting all right. It also gives permission or reassurance about something that already happened — it's fine that you're late, these things happen. Note 괜찮다 covers both "acceptable to you" and "not a problem", and these lines use both.