I started watching this as I am fan of the FL.

The ML is calculative from the first episode. Didn't like his character at all. He forcefully sends his sister abroad breaking her love saying " career is more important" and then suddenly feels bad that FL is going for a 3 years training . I mean he is okay with breaking up his sister's love in the name of career but doesn't want FL to leave him. He doesn't understand FL at all and keeps misunderstanding and throwing tantrums. Overall FL has a mature role in this one and all other characters are good except ML.
The ending is nothing substantial as well.