Return of the Lord

Water God Ming Yao sacrifices his life for the lives of the three realms, yet becomes the servant of Jun Sheng, the Demon Lord after five hundred years. Does he live the rest of his life as a mere servant, or pretend to be meek and get his way up, using his strengths to return to the heavenly realm? His relationship with the Demon Lord in the past life never really ended, how does he cut off those shackles? What will be Ming Yao's future?

(Source: Kuaikan, translated)