This isn't the usual case, but it can (and probably does) happen. People stuck in abusive relationships rarely have autonomy over their body, so it's not surprising that Nanjo assumed the worst
Sunhwa could have been forced to bring Nanjo for a threesome or whatever, at this point Nanjo is still legit. However, as Nanjo gets to know Mokyeon, doubts starts raising, then it's only denial or so, which is what Mokyeon told Nanjo - that he is too perfect/superior to admit being wrong/fooled haha
I'm really curious about what happened, why Mokyeon is in this state - ch33 better address this straightforwardly. Well I wouldn't mind if there's a Nanjo POV first
the protagonist is Mokyeon and we see the story through his eyes. The author previously mentioned a Nanjo POV is not necessary. Let's see if she sticks to this routine until the end or if we'll ever get to see the story from Nanjo's perspective, whether past or present,
I wanna know how nanjo will react after knowing how nice of a person sunhwa is! Going such lengths for someone like him.
Also why does nanjo even think sunhwa is a genuine person and a victim? I mean who in their right mind would suggest threesome if they like someone? ( Or maybe it happens irl too I'm just not aware of it)