Your Majesty, He Always Wants to Tear up My Divorce Papers

After their wedding night, King Chu Ce (male protagonist) of Zhenbei (male protagonist) and his concubine Su Yu (female protagonist) both returned to the time five years ago when their relationship was at its most tense. In the previous life, Chu Ce misunderstood (or was designed) that Su Yu's heart belonged to someone else and was unfaithful, so he treated her coldly and harshly; Su Yu was disheartened by Chu Ce's indifference, the frame-up of his "White Moonlight" Liu Yanran (female partner), and the pain of losing her child, and was eventually "died" by Liu Yanran when Chu Ce went on an expedition.