Three Hundred Years Undercover in the Demon Realm

At the Phoenix Terrace of the Mortal Realm The immortal lord, bright and pure as moonlight, said, “Yaozhi, within three years, the Immortal Realm will surely assemble its forces and attack the Demon Realm, wiping out every last demon.” Du Yaozhi: “...Three years, then another three years, and then another three years. I've been undercover in the Demon Realm for three hundred years, boss.” The immortal lord gazed at her, his eyes filled with unspeakable guilt and affection. He declared, “Yaozhi, trust me. I won't keep you waiting much longer.” The Demon Realm A strange red moon hung in the sky. The air was thick with a damp, sweet stench. Countless twisted, soft-bodied creatures crawled over the rugged, endless mountains, while beautiful moths with human faces swarmed in clusters... In a palace adorned with bones and jewels, a pale, handsome man sat upon the throne. Countless cold, clammy tentacles extended from beneath his black robe, embroidered with golden patterns. “Zhizhi.” The Demon Lord spoke in a hoarse, strange voice, unlike anything a human could make. Simply saying her name brought a sickly blush to his pale face. [Reading Tips:] 1. An ordinary woman who transmigrates into a book x a tentacled nonhuman Demon Lord. Happy ending. 2. Romance-focused. Everything serves the love story. Theme: Love begins without reason, then runs deep.