Fortune's Trial: Who Will Be the Heir?

DramaBox synopsis

Hugh Foster is the richest man in Yolifornia. However, he is concerned about his children's habit of spending money irresponsibly, so he hides his identity and raises them as an ordinary man. After being hospitalized following an accident, he decides to test his children by promising to leave his fortune to whoever passes his tests. Faced with their father's illness and the challenges of caring for him, what will his married children do?