All I could think of was Stockholm Syndrome. He approaches her, says that she is his slave and must do whatever he wants, she puts up with it and falls in love. Why? Japanese dramas often give the ML a tsundere personality, but that concept really needs to be able to show that the ML actually has a humane and "soft" side to him. That was not in evidence here. He was just mean, in his words and his actions. Then, suddenly he frees her, saying she bores him. The constant manhandling by him, she would have had bruises all over her face from the way he was grabbing her all the time. So, this was not a character I could root for.

Then there's the FL. Grow a spine! I know that we often like to watch things that are not realistic, it's part of what makes us watch dramas, to escape from real life for a while. But she would have had to had absolutely no self-esteem to put up with and actually be drawn to his behavior. She would have had to fall in love with him BECAUSE he treated her badly, because there was certainly nothing else going on in him that was likeable.

Then there's the 2ML, sweet and gentle, that likes her too. All I could think was that if he really liked the girl, he would have insisted that his friend treat her better. Instead, they bet on the outcome of a one-on-one basketball competition for the honor of being with her.

I did like the idea of him showing his feelings in his music, but that didn't happen often enough to make up for his poor treatment of her.