From Servant to Demon Emperor

Zhao Changge transmigrates as a servant in the Demon Emperor's mansion and is coerced by Lady Bai Xiyue to gain power. After awakening a system, he agrees. When Bai Xiyue attempts to silence him, Zhao Changge escapes but is captured by his rival Lin Wanwan. Suspecting foul play, he flees and accidentally enters the Demon Emperor's room, where he meets Ling Zixuan. Soon, Lan Yurou and Lin Wanwan join him, and they conspire to deceive the Demon Emperor. Zhao Changge subsequently meets Han Mengli and Shen Yue like, as well as the eldest lady Feng Nishang. The Demon Lord covets his opportunity and imprisons him in the Immortal Tower to brew medicine, which contains the Holy Maiden Chu Yaohua. Zhao Changge achieves the status of Immortal Emperor, breaks out of the tower, kills the Demon Lord, and ends the thousand-year war between immortals and demons.