Su Ye transmigrates into the body of Luo Qinghuan, the female protagonist of a female-oriented novel he once read, and becomes bound to the Darkening Investment System. Under his influence, every time Luo Qinghuan turns evil, she can receive rewards. These rewards can be invested or left unused, but investing in the darkening female protagonist brings even greater rewards! And so, Su Ye goes all out to corrupt her and relentlessly invest in her! Just as all the powerful cultivators of the Xuantian Realm declare that they will join forces to eliminate the female demon, Su Ye finally reveals himself. After repeatedly corrupting and investing in Luo Qinghuan, he has already reached an unprecedented and terrifying level of power. The world is utterly stunned to discover that within the female demon's body resides another being: an ancient Demon Venerable who has existed for countless ages!