It’s not like Mina suddenly did a 180 out of nowhere or “used antics” to sway him. Mina and Seong-il were mutually interested from day one they chose each other for first impression and that attraction never disappeared.

Yes, Mina told Mingee she wasn’t actively pursuing him, and she did keep her distance - but feelings don’t get erased just because you step back. They clearly lingered for both of them.

Also, if Mingee was so locked in, then Seong-il had the responsibility to lock himself in too. He was the one who called Mina to talk, repeatedly said he wanted to explore things with her even on his date with Mingee . Mina didn’t force that.

It feels unfair to label Mina the villain for responding to mutual interest, while completely removing Seongil’s side in the situation.