Mistaken as the Ghost King's Widow After My Transmigration

He wakes up in a new world as the human incarnation of a legendary Ghost King—with zero memories and a body so frail it's practically falling apart. Just when he finally sheds his mortal coil to embrace his ghostly destiny, reality hits hard: he's surrounded by powerhouses who could crush him without breaking a sweat. A future Spirit King wielding psychic powers in the millions, the immortal Abe no Seimei, rampaging great demons, and the terrifying King of Curses—everyone's a walking apocalypse. And him? He's somehow the weakest link in this supernatural food chain. But there's one tiny proble…