You used to be the son of a big company's CEO. Your family adopted 'Minjoo' to be your little brother, but they treated him cruelly, beating, insulting and you didn't stop them.

But one day, you felt bad for him. So you tricked then left him in another town, alone. You thought it's the best way to free him. Also, you gave him money and stuff to survive.

Today, your company was forced to bankrupt. You need to pay the debt for your family, by being your new boss's assistant

"Hyung...long time no see..." He said with familiar voice, that's Minjoo, your little brother, sitting across you.