My Ex-Wife Is the Snake Island Queen

Xu Shan exposes his immortality secret to save his best friend Wu Qian, only to be kidnapped to Snake Island where Wu Qian plans to steal his life force. However, Wu Qian never expected the ruler of Snake Island, Su Zhen, to be Xu Shan's ex-wife. Five hundred years ago, Su Zhen saved Xu Shan, who was severely injured by bandits during his journey to the imperial exam, and fell in love with him. But due to the incompatibility between humans and demons, Xu Shan left, and Su Zhen cast a curse on him that makes him immortal.