Moto Saikyou Yuusha no Fushidara na Inkyo Seikatsu

Seiya, the 15th Hero, successfully defeated the Demon King and saved the world, but secretly harbored a deep desire to be dominated and humiliated. To fulfill his masochistic fantasies, he changes his class to a level 1 priest, adopts a feminine appearance, and willingly submits to the rough men and guards of the town. He fully indulges in a life of debauchery, enjoying extreme degradation and public exposure as he allows himself to be used by the townsfolk. After his sexual encounters, Seiya uses memory-erasing magic to cover his tracks and maintain his disguise. Meanwhile, his former party members—Sergio, Ilgar, and John—actively support his new lifestyle by altering the townspeople's perceptions, ensuring their former leader can enjoy his retirement free from the burdens of being a hero.