You're Invincible, Disciple! Go Wild After Leaving Prison

[This is a decisive, invincible power fantasy with no saintly do-gooders or groveling love interests, just a triumphant sweep from start to finish!] Lin Cang was once the Demon King of Skull Island, where he imprisoned thousands of powerful outlaws. To find out what happened to his parents, he is forced to go to the Su family and fulfill his marriage contract. What? You look down on me? And you want to swap in the unwanted Su Yourong to marry me instead? Fine! I'll make you regret it until you can hardly breathe!