My Husband Changes Every Night

Following the death of the World Tree, all that stands between the apocalypse and salvation is the Divine Maiden, prophesied to restore peace and prosperity. But never mind all that. Princess Terriella has more immediate concerns: her family keeps trying to kill her, she must conceal her secret healing power, and she has just learned she is being sent to marry the notorious tyrant Emperor Rivanfel von Leonharta. However, there's more to Rivanfel than meets the eye. He's different at night, hiding a grave secret, and Terriella discovers she isn't the only one with something to hide.