Mistake + Inheritance = Love?

Can Mistake bring Love ? or can Love bring Mistake?

Many was shocked because the successor of the world's biggest empire was found!

Khaye was just a simple girl not until she met Nigel Lee, "the guy next door" whom she thought a "royal jerk." Nigel went to Korea to find the missing grand daughter of Richard Campbell , one of the world's richest man. Fortunately he found her---Khaye.

But what if a mistake was done?....

She's not the real grand daughter of Richard!!
Is this some kind o a joke!? She would be thrown out in the mansion!

What would Nigel do if he was now deeply in love with Khaye? What would be the consequences of this crazy love equation if destiny sets them apart?

Could this engage to a happy ever after ending? Or the love they felt would bring them lifetime regret.