Disowned and Returned as the Real Heir

Lysander grows up in a rich household where his parents favor his three sisters, and he spends years trying to please them. They throw him out anyway, and he dies. He comes back to life and decides he is done pleasing anyone. The national exam results are posted with Lysander at the top of the list. Soon after, it comes out that he is the richest man's son. The family that looked down on him and cast him out cannot take either fact in. His parents go down on their knees and beg, and his three sisters are full of regret. He tells them the disownment papers are already signed, and that they can get lost.