The Billionaire Janitor's Return! — Episode 15

Chesada, a billionaire living in shadows, returns as a janitor. Once a global arms CEO, he retired for family, only to be kicked out by his own son. In his low point, he rescues a girl who sets him up with her mother, Emika, a cold-hearted headmistress. They enter a fake marriage contract. Chesada secretly protects Emika from school board conspiracies and saves the school from bankruptcy. When Emika faces removal, Chesada reveals his true identity as the world's richest man, using his immense wealth to secure her position.