Jung Jessica, a beautiful, charming girl. Her charisma has the boys go crazy for her, everywhere she goes, there's always one person that'll try to flirt with her. But the only problem is that Jessica is rude, stingy, y girl, well to the boys actually. To the girls, she is like an angel; always kind, sweet, and helpful. Any boy that tries to flirt with her will  simply get rejected but any boy who keeps trying and eventually gets annoys of, will get a taste of the ice princess, especially players. The reason behind this is because Jessica has gone through it before and so has her mother. Her mother had died because of depression because her husband cheated on her and Jessica had been cheated on before as well. Ever since that day, she has been taught that all boys are the same; a jerk, they're self-centered and always a player. The only guys in her life she trust is her cousin and her uncle. Her aunt and uncle have been taking care of her ever since she was 10. No guys has ever melted the ice. 

Lee Donghae, a charming, prince-looking, and hot guy. He transfered to a new school along with his bestfried 2 years ago and by the first day, every girl goes head over heels for him; everywhere he goes, there's this one girl who eventually catches her eye. The only thing about him is that he's a player. He's arrogant, self-centered, and a playboy. He gets what he wants and who ever he wants. He dated like all the girls in their college. Sometimes, he even goes for the older ones, and Im talking about the girls who are like 5 years older. Donghae is a type of guy who doesnt take no as an answer. The girls always end up saying yes, and end up getting hurt but he never regrets hurting them. He just acts like he doesnt know the girl at all, he just simply ignores her and gets another girl with him. To Donghae, feelings are nothing to him. He never gets any of those lovey-dovey feelings from any girls, thats what makes him the heartless jerk. 

Since Jessica is known to be very cold to the boys, Donghae and a couple of his friends decide to make a little bet on her. A bet that could ruin her image and will probably get Donghae the title, the most intelligent playboy ever. They both had their own jobs; his job was to melt the ice and her job was to keep her ice solid, but one of them failed to do so.