Kim Myungsoo was known as Seoul's heartbreaker. He changes his 'pet' everyday but girls just wouldn't stop chasing him. He is undeniably good looking, he's also rich which is one of the reasons why girls would just throw themselves at him. No matter how many girls he had been with, he had never been in a relationship. He promised himself to not get attached to anyone due to his past.

Lee Jieun had a good life with her family, she had loving parents that would do anything for her. Well, that was until she caught her dad cheating on her mother. Her mother got into depression and Jieun swore to never fall in love. She didn't want to go through all the pain her mom had gone through. She doesn't believe in love.

Wanting to forget everything, Jieun and her mother had moved to Seoul. Far away from her heartless dad. They wanted to have a new start and that also includes Jieun enrolling into a new school which is coincidentally the same school Kim Myungsoo was in. 

What if they both met and Myungsoo felt something he had never ever felt like with all the girls he was with and what if Jieun wants Myungsoo in her life but for the sake of her heartbroken mother, she pushes him away?