If You Fail to Overcome the Tribulation, Should You Marry Someone and Become a Taoist Companion?

[Marriage Change] The young demon king failed to cross the tribulation and came to a strange continent. He turned into a white-haired girl and lost all his cultivation. He was also sold to a land of dust and was forced to serve an old pervert. What should he do? "Hey, young hero, young hero, help me, I was abducted!", "Then are you willing to marry me?", "???", "Should I get married if I fail to overcome the tribulation?". In this fairy world where the human race is flourishing and immortals, demons and monsters have become expendable materials, she, who is a mixed race of three races, is regarded by the genius boy as the fate she is looking for, and a story unfolds.