I wonder what set off Min Soo more.
The fact that Sul mixed up her style a bit or that Sul won't tell her where she got it.
Honestly, I don't get why Sul didn't just say it was a gift and just left it at that. Then she'd have an excuse as to why she couldn't tell her where she got it (plus it's technically true)
Her way of hinting to Min Soo that she's getting unbearable?
I mean, everyone has some aspects of Min Soo. You're walking around campus and you see someone in a nice bright skirt and you go, "Oh, that's nice. Maybe I'll buy a nice bright skirt the next time I'm down shopping." Or if you're looking through a magazine and see a fashion model with really cool pants and go, "Oh, I guess that's in style right now. It doesn't look bad! Maybe I'll buy a pair of those?" But pinning on a certain individual and obsessively copying every aspect of that person (their hair, their clothes, their entire personality??) is definitely a problem. And then painting that individual as evil when that person tries to change and finds them uncomfortable? Min Soo seems to have some sort of issues going on. She needs help. NOW. BEFORE YOUNG GON GETS TO HER.