When Can I Get My EUPHORIA?

To make the story short....
This was a story of a mobster. A secret Sovereign. A merciless lady who killed just for fun or out of boredom. But this lady will fall for a man which she loathe so much. But in the end this man's just cheating on her.
He broke her heart.
She intends to kill that man but then, she's in love, how can she kill the man she loves the most?
On her way home, she bump the guy which she admires. She admires him for his soft voice and gentle personality. She hid him in her house and treat him as his older brother.
But something's still blocking her way to euphoria. Her father threatened her to marry a man that she doesn't even know. She don't want to, but she need to.
Or the man that she learned to love....
The man who taught her to love again.
The man who treats her as his whole world.
The man whose sweet.
The man whose gentle.
The man with the soft voice, will be killed by his father in front of her.
What would she do?
She can't let that thing to happen.