He is a guy from a poor background. She is a girl from a high class background.

He have nothing. She have everything.

He have no father and only have a paralysed mother. She have both perfect father and mother.

He need more money. She need more attention.

He want to change his life. She want to enjoy her life.

He want to be like her but she want to avoid living like him.

Everything change when she meet him accidentally. She saw the real life that happen around her. The life that she never saw in her past life. They way people treat each other differently according to their background. She realise how money can hurt people. 

"Your place is not here. This is not a place for a princess like you to spend the times."

"I like it. I really like it. Marry me and I will help you for the rest of your life."

"Whatever you are trying to do, it just a waste of energy. Just go back to your mansion. Never come back to this cave."

"I know, You will fall for me. One day. I'll make sure that I was right."

OH HAYOUNG, 20.

A rich adorable girl who able to make every guys in the world fall for her. She have the face, money, cuteness and even brain. But she lacks of love. With both her parents busy with work, she have no one to give her loves except her one and only cousin, Yoon Bomi. She spent almost 20 years with Bomi. For her, the world around her was only money and living happily. Money is her happiness. For Hayoung, she really can't live without money.

DO KYUNGSOO, 22.

A poor emotionless guy who lacks of everything especially money. He only have a paralysed mother who can't move without his help. The only child in the family, his father died two years ago after being killed by a loan shark. He is now working as an employer at a workshop to get some money in order for him to pay the remaining debt. For him, the world around him is so cruel have have no heart. He rarely smile because his life is dark enough to make him smile. Kyungsoo really want to change his life.

YOON BOMI, 22.

A  very dorky girl who always there for Hayoung. But she have a bad dark past. A past that she is now being called a mysterious single mother. Yes, she have a daughter, Bona. Bona's father still remains mysterious. Wanna know who? Keep reading until the end.

Kim Kai, 21.

Nothing we can say about him because he a badass friend of Kyungsoo. He is the owner of the workshop Kyungsoo was working at. A hardworking boss at day but a player at night. 

KIM MINSEOK, 26.

Kyungsoo senior and best friend since middle school. Full of charm and a very responsible person.

KIM MINJI, 18.

Minseok little sister who is in love with Kyungsoo. Have a lot of aegyo and never give up with everything she do.

I'm done. I don't need anything more out of life. I have you, and that's enough.

Then, by your definition... I'm in love with you.