Baek Yeonhui's husband, who runs his restaurant business, ESPOIR.
Jung Byungguk is Prince Charming and also a third-generation only son.
He obeys her mother's order, but on the other hand he used to date numerous women and made his mother be worried about him.
Then, Byungguk meets a pure and innocent woman Yeonhui and decides to marry her.
But, he is disappointed when his wife cannot bear a child after the cancer surgery.
His mother prepares to have a surrogate mother and he follows her wish.
Meanwhile, Byungguk meets his ex-girlfriend Lee Hwayoung again as a business partner and falls for her again.