For him, living with his son is a comfort zone. But then his son ask for a mom's real care and affection. He knows that it won't happen. Hiring a fake mom for his son is the solution. And I guess...this is where the story started. It began when he uttered the words... "Be My Son's Mom." Follow the story of Kai in searching a mother's love for his son, and accidentally finding the love of his own.