Love of the Divine Tree season 1 episode 25 (1x25)

Su Yishui, a talented young cultivator, had his destiny changed by his master Mu Qingge eighteen years ago. Mu Qingge, known as the "female demon," was also branded with a bad reputation and presumed dead. Eighteen years later, Mu Qingge transforms into Xue Ranran, and Su Yishui, now the head of the West Mountain Sect, takes the critically ill Ranran as his disciple, vowing to protect her for life. Thus, the roles of master and disciple are swapped, and various amusing and unusual stories unfold between them.