His Hidden Maniac Fiancee

Ethan Ye is an immortal tricked by Rufus Liu into marrying his impaired granddaughter. Ethan needs her unusual bloodline, so he secretly protects her. The female lead known as the 'madwoman' of the Liu Clan, with a violent, erratic personality and mastery of poisoning. In front of Ethan, she hides her true nature, acting as an obedient girl. When her younger sister, coveting Liu Clan's assets, provokes and bullies her, the female lead transforms into a ruthless maniac when Ethan is not looking.