Son Na Eun, a shy and innocent girl who trust people easily. 

Luhan, a well known playboy and bad guy who doesn't trust people.

A weak hearted girl

A cold hearted guy

She is like an open book 

The key to his heart has not been found.

The two of them with completely opposite personality.

No one expected any dramas to revolve around them.

However, they were so wrong about that.

A small incident had made a big impact on the two teenagers.

Son Na Eun falls in love with him despite knowing that he is a playboy.

She just falls deeper with him when she tried to forget about him.

Everything about him attracted her.

She could not just forget about him easily.

After much contemplating, she made a decision.

Which is to try and make Luhan fall for her.

Son Na Eun

A shy and innocent girl. Despite her beautiful looks, good grades and wealth, no guys dared to approach her as they were scared of the consequences that will be given by her parents. Her parents owns one of the largest company in Seoul and Son Na Eun is their only daughter, thus they were very protective of her. A warm hearted girl who is easily touched. She hated herself for being too gullible and an open book. Na Eun has been wishing to find her true love and wanted to experience something called "First Love".

Lu Han

A well known playboy and bad guy. In a blink of an eye, he could capture the hearts of every girl he saw on streets, schools and others with his handsome features, sweet words and actions. Every girl he dated never lasted for 2 months and the number of girls he dated exceeds 50. The cold hearted guy could be very sweet to the people he likes and could be very mean to the ones who he detest. Hence, many people are scared of him. A guy who doesn't trust girls after he was dumped by his girlfriend and was determined to make every girl suffer.

Park So Ra

A crazy and cheerful girl. She has a really wild imagination that could make someone's jaw drop upon hearing it. Park So Ra has the ability to get close to people easily with her smile and friendly traits. Although she may seem childish and crazy, she is a very helpful and is a good listener. She gives the best advice one could get. Her caring personality makes her known as the kind hearted girl at school.

Park Chanyeol

A funny and bubbly guy who always smiles. Park Chanyeol is the only guy who could get close to Son Na Eun due to his parent's relationship with hers. They have known each other since young and they are very comfortable with each other to the extent that they tell each other their secrets. People thinks  that his life is so peaceful and he is always happy, but the truth is, he is just a normal guy who has a lot of problem which he can't be said.

Seo Joo Hyun

A mysterious girl who just entered the school not too long ago. Many people says that it's hard to get close to her because of the aura around her. It makes people feel that she is someone powerful and she is not someone who anyone can mess with. Countless of boys confessed to her but were always rejected. Rumors said that she dated before. But no one knows who it is, why they broke up other than her and her ex boyfriend..

Oh Se Hun

A cold guy but caring when you get to know him better. His quiet personality makes many girls fall for him. Oh Se Hun is a popular guy at school and is friends with Luhan. However, he is different with Luhan as he doesn't go around and flirt with girls. He just ignores all girls as he thinks that they just like him for his wealth, face and others other than his personality. Deep inside, he just wishes someone to like him whole heartedly and has the ability to make him laugh carefreely.