I'm Not a Plumber, I'm the Hidden Heir.

The Story

Leon endures years of poverty and humiliation as a struggling plumber, believing he saved his dying father. He survives by sharing a home with a runaway heiress, unaware that his parents faked the illness to test him. When the pressure becomes too much, the shocking truth emerges: Leon is the secret heir to a trillion-dollar empire. The former broke worker now transforms into the ultimate tycoon, reclaiming his place at the top of the family fortune.