The Jiang family is known to for their huge business empire, Jiang Corporation. Jiang Xifong, the chairman had two daughters, Jiang Qing Mong and Jiang Ming Fan. Some say that it was a curse that his wife could only bear daughters and no sons, but he loved them both, not until his eldest daughter, Qing Mong had a child with someone not of their level. It made him angry, and resulted for his only daughter to run away.

Now many years later he is searching for his lost granddaughter, Qing Mong’s husband had hid his daughter with his sister. Qing Mong died after giving birth to her daughter and six years later, her husband followed her.  As for their daughter, she is currently living with her aunt and cousins.

Jiang Minyoung is the only daughter of Ming Fan, she is currently living with her grandfather. Since her grandfather doesn’t have any sons she is supposed to be the successor of the company, but the elder Jiang knows she cant handle everything. So, when she was still young, four boys from rich families came to live with them. They were to be trained for the ways of the business and help her cope up with the company.

Because for grandfather Jiang, successor and heir is different. And of course, he wants his granddaughter to end up with someone worthy of her. That is why Minyoung is HEAVILY GUARDED by her four “brothers”.

But what if someone turns up after the search, someone who claims to be the lost granddaughter?

But doubts start to appear as they get to know her.

Will they be able to find the REAL granddaughter, the lost daughter of  Qing Mong?

It has always been peaceful between the five youngsters in the Jiang mansion, but what if someone new joins them and starts to create a mess. Minyoung starts to doubt her and everyone is turning against her, even her four friends. But what if she is right?

There is an imposter in their house.

And she needs to find the real granddaughter, her real cousin.

And….jealousy will always be there.

Especially if the miss imposter is trying to seduce someone she….cares for.

Then Junhee came, the genuine cousin of hers.

Her arrival causes great happiness to the elder Jiang but….complications start.

Feelings start to grow and troubles start to form.

Junhee has two guys pinning after her.

Who will she choose?

The guy who makes her feel comfortable or the unpredictable lad whom she thinks she’s on a roller coaster ride when they're together?