This movie is really peculiar.
The focus is not the romance, not both ML, but just purely on the FL, imo. When you watch this, focus on her, don't mind the MLs.

This is a story about intense love turned into obsession. About love that can turn a happy and normal person into an empty shell, devoid of emotion. This is about how a person become emotionally aware and awoke, a journey of realization. This is about loss of trust between lovers, and the budding of healthy, strong relationship and romance between 2 people. This is about the importance of 2 healthy individual in a relationship, emotionally, mentally, and physically.

The acting is superb. Both FL and ML did a great job, but you should really understand the phase and emotion of the character to know whether they are portraying the character or just do a poor job at doing their work.