Also known as The Mermaid's Hundred Ways to Be Eaten and Every Time I Come Home, the Villain Is Being Adorable.
A seemingly upright top with a slightly dirty mind, endless snark, and plenty of experience x a seemingly weak but inwardly dark, manipulative, and obsessive mermaid bottom.
As a cannon-fodder character who dared to top the villain, Bai Xiu thinks he must have been drunk to do it! Bai Xiu transmigrates into a novel he just finished reading, becoming the vicious male supporting character who cruelly abuses the villain and drives him to become evil. Faced with the ferocious, corrupted villain who's also a feast for the eyes, Bai Xiu can only ask, "Can I repay my debt of love with my body?"
The main character is the top!
Pfft, I never imagined you were this kind of person, brother.