Second half of show was a melodramatic mess. The thing I hated the most was when the 4th prince (the scarred face) would grab Hae Soo’s waist and pull her close to him. It happened way too often and it looked more like he was shoving the lower half of the her body onto his own. She was always grabbed and the guy was manipulative and toxic.
Yeah, the second half of the show, after it’s “dark turn” in it’s storyline, fell into a sinkhole. It felt like The writers didn’t know how to write Hae Soo’s character anymore and she became a dull, flat, boring character. Maybe the second half of the show was written by another team of writers. Her character wasn't appealing to begin with. The ending also sucked.

IU's acting was bland and still the same in other shows I've seen her in.