After the Fox Cured the Ailing Immortal Venerable's Gu Poison

A fox demon spy who transmigrates into a book, the cunning top, versus a cool and aloof righteous immortal with a love curse, the villainous bottom who falls into darkness for love.

Also known as: After I lifted the Immortal's curse and faked my death to follow the plot, the aloof Immortal fell obsessively into darkness and caught me by the tail so I couldn't escape!

Theme: Strive to change your fate