I have a crush on my worst enemy's brother..

A girl had a worst enemy ever. He always teases her ever since they were kids. She doesn't know much about him but she does know how evil and annoying he was.
One day, she met a handsome man near they're school. He was a student teacher, she instantly falls in love with him. She'll do whatever it takes for him to notice her and her feelings, but there's one big problem...
Her crush was also her worst enemy's brother which she really hates the most. How can she achieve her goals if her enemy is in the way?? He'll probably annoys her more and won't succeed that easily.