This is my first review but definitely not the first C drama that I watched and I've honestly seen better.

Story and main characters: firstly I'd like to say that this is not a sweet or fluffy drama. Although there are no heavy themes, but the sweetness is overshadowed by the toxic character of the ML. There are some major plotholes like how did she magically get so good in studies despite not studying, her sleepwalking issues, and above all why she chose to believe a mere voice recording and all that. The ML was controlling and over possessive and i don't like that but he was protective so that's a plus i guess. But he is too immature and childish. There's the love polygon cliche and honestly i like the other admirers more. There's obviously the evil chick squad cliche too and they are loathsome. Also the FL is dumb and very easy to manipulate and too emotional.
Also i saw a lot of reviews regarding incest. Well the girl was adopted when both the kids were pretty grown up and and childhood friends. Also, even in childhood the boy liked her (it was shown in a flashback scene for those who didn't notice it). So i wouldn't really say it's incest. Adoption was more like bringing her up after she lost her memory than passing her as their own daughter.

Acting: The ML' acting improved a lot towards the end (or maybe that's how it was supposed to be with his expressions), so i will say it was okay although his character isn't at all attractive. The FL sometimes tries to be too cute and it's annoying. Her acting felt more natural towards the end too. Mr Ouyang played the heartbroken and helpless guilty lover very well. Le Diyin's acting was beautiful. Qin Yao's regretfulness was visible.

Other characters: So Le Diyin is my most favorite. He is super sweet and i felt that he really loved the FL. Ouyang Yu (he deserved a lot better but was a little too emotional) and Qin Yao were also good. I also felt that Ouyang Yu was much better suited to the FL than the real ML (i personally think how could the FL fall for him when there were better people around, unless she was masochistic?). I didn't like the ML at all until towards the end. Liu Zihui was cool. Ouyang Qingxue was disgusting throughout. The parents of ML were so loving (and especially when the mother walked in on them cracked me up).

So i guess that's pretty long review but that sums it all up. I stuck around till the end mainly because i wanted to know what would happen to the side characters, because the story of the main character was pretty unrealistic to begin with. I watched it once but I'd never rewatch it. There's loads of better high school dramas out there.