It was entertaining to watch because I was bored, but it isn't a good drama at all!
I don't know why always the ML has to be the best student and the FL the worst ond. It is so annoying and frustating. But that's not the biggest problem if this drama.
Su Mu Yun is literally obsessed with his sister. He is supossed to be secretly in love, but he tries to hide it by bullying her, treating her like a maid, manipulating her actions, the places where she goes, the way she dresses, the people she talks to or hangs out with. He follows her everywhere and stalks her all the time. He always force her physically. It wasn't cute at all. He is so possesive and toxic. Also he is so rude to everyone.
Su Nian Feng is so submissive and so easy to control, not only by her brother, by everyone. She has no personality. She was cute sometimes, but it deseperated that she let everyone do whatever they want with her.
The only likeable characters are Le Di Yin and Li Zu Hui. The others are meh.
There are some parts that are funny because they are so cringy.
The best part of this drama is the music. I loved the songs, especially the opening.