My Househusband Is Gamble King

A legendary gaming master conceals his true identity to honor a dying mentor's request, dutifully caring for an ungrateful heiress for three long years. Despite his constant loyalty, her household treats him like a worthless servant and heaps endless mockery upon him as his promised tenure nears its final days.

When a deceptive scheme threatens to bankrupt the arrogant dynasty, the meek husband steps up to crush the swindlers at their own game. Having fulfilled his vow, he quietly vanishes into the shadows, leaving his stunned spouse frantically trying to track him down.