The Janitor Is Secretly a World Billionaire!? — Episode 15

Billionaire Jack retires to spend time with family. Formerly CEO of world's largest defense contractor, he now works as a school janitor. One day, his ungrateful son kicks him out to make room for a newborn. Jack then rescues a young woman in distress. Impressed by his bravery, she sets him up with her mother Emma, a cold and strict school principal. They enter a contract marriage. However, the school dean plots relentlessly to oust Emma. Jack repeatedly saves her from schemes, even rescuing the school from bankruptcy. When Emma faces her greatest crisis and near expulsion from the board, Jack steps in with billions to defend her honor. His true identity finally comes to light: he is the richest man in the world.