After I Dumped My Fiancé, He Fell into Demonic Cultivation

Ji Zhen was handsome and came from an exceptionally distinguished family. From childhood, he had been the apple of his family's eye. Though he was merely an ordinary mortal, he was engaged to Jiang Yi, a man of unparalleled grace and beauty who was rumored to be on the verge of ascending. Everyone in the Three Realms envied them. But Ji Zhen couldn't be happy. He knew that the first thing Jiang Yi would do after coming down the mountain was get engaged to the crown prince, then dump him, leaving him the laughingstock of the Three Realms and saddling him with all the blame. So what if he was stunningly beautiful? So what if he was about to ascend? Did that mean he could stop treating people like people? Ji Zhen couldn't swallow this insult, no matter what. Now that he knew what was coming, Ji Zhen refused to sit around and wait for it. He resolved to toy with Jiang Yi's feelings, make Jiang Yi crave his body, then use him and throw him away, so Jiang Yi could get a taste of being ridiculed. But Ji Zhen never imagined that this top prospect of the immortal sect would be so fragile inside. He went straight off the rails and fell into demonic cultivation! After this whole affair, Ji Zhen's name became renowned throughout the Three Realms. He became a legend, and everyone praised him as insanely badass. At last, his reputation wasn't a stain anymore. But as the new Demon King's favorite consort, Ji Zhen couldn't smile. Theme: Save a marriage in crisis and rescue a young man who has gone astray.