Forced Into a Blind Date from the Start, I Became the Villainess Empress's Live-In Son-in-Law

After transmigrating into the body of an ordinary man, Lin Fan is forced into a blind date from the start. His match is a breathtakingly beautiful woman radiating overwhelming demonic energy, who claims to be the female emperor of the Immortal Realm! Lin Fan is dumbfounded. He only wants to live quietly as an ordinary man, so what is this female emperor's deal?

[Ding! Congratulations, Host, on activating the 'Villainous Son-in-Law' System. Mission: marry the female emperor and become the son-in-law she trusts most! Reward: an Immortal Emperor-grade cultivation manual, The Heavenly Scripture of Living Off a Wife!]

Lin Fan looks at the female emperor before him, who is decisive and merciless, wiping out entire sects at the slightest provocation. Then he looks at the 'Heavenly Scripture of Living Off a Wife' given to him by the System. "System, are you sure this thing will keep me alive?"

System: "Host is a prodigy at living off a wife, a talent rarely seen in all the ages. You are destined to rely on your wife to become the strongest man in the Immortal Realm!"

Lin Fan: "But I don't want to live off a wife!"

System: "If Host refuses, the female emperor's 'World-Destroying' skill will be triggered at random!"

Lin Fan: "..."

He only wants to live as an ordinary man, but is forced to become the son-in-law of a villainous female emperor in the Immortal Realm. His daily tasks are to keep her happy, take the blame for her now and then, and even help her refine her 'world-destruction plan'!

Lin Fan discovers that the more 'weak and useless' he acts, the more the female emperor trusts him, and the more generous the System's rewards become. It even simulates a future in which he becomes the 'Immortal Realm's Number One Son-in-Law Immortal Emperor'! All he can say is: this System is toxic, and this female emperor is crazy!