Honestly, it was really confusing at first, but if you observe and watch it and not rush things, you will have a good chance of understanding it at first episode itself. For me, I had to repeat certain parts of episodes to understand the scenes succeeding them. It was a complicated network of past and present. Coming to the actors and their portrayal of the characters. Jeon Yeobin as Han Junhee/Kwon Minju was perfect. From being a shy, coy girl named Minju in 1998 timeline to a career driven, independent and proud Han Junhee in the present, it was sheer perfection. Liked her more than Vincenzo here. Next, Ahn Hyoseop as Goo Yeonjun/Nam Shihyeon. I will say this, cuz nobody else will, he was the most confusing character in this drama. You can't understand and figure out what his deal is, until the end of the drama. Yet his acting was pretty natural I'd say, especially that bl cameo story with Rowoon as Taeha was amazing actually. Kang Hoon as Jung Ingyu. Man I hated his character no offence. He liked Minju, that was perfectly fine, I mean second leads are supposed to fall for the FL, but ditching your best friend who once saved you from getting bullied by your colony kids for a girl?? That some immature and rude move. I so desperately wanted Shihyeon to ditch him and not be his friend anymore, and I wouldn't be lying if I say that I also hoped for Ingyu to be the killer, so much, just so he'd be out of Minju and Shihyeon's life. He was that infuriating, and his expressions kinda looked like psychopaths. Anyway, conclusively this drama is a pretty good watch, but you might feel an urgency to finish it as soon as possible, as I did get impatient by the time I reached the half of it, tho I do recommend it, it's a light thriller romantic so you guys can give it a watch.