Worker Dad, Billionaire Secret

Mikake Hiroichi hides his identity as a world-class billionaire and works as a cashier while raising his son Kasuma. Kasuma suffers from his forceful wife and in-laws. When he is about to face crisis at his wedding, Hiroichi gives an astronomical amount of money, but still faces insult from people. Suddenly, his past foster daughter appears, claiming to want to marry Kasuma.