Princess Lunaphilia, who suffered a mysterious illness in childhood that left her legs impaired, has been treated coldly her entire life. Seen as a convenient political tool due to her disability, she is forcibly married off to a tyrant from an enemy nation. But on the journey to her new homeland, she is suddenly abducted by Cain, the “King of the Night’s Darkness,” a fearsome being revered and feared by all. “You are far too precious for me to simply let you die.” Having long abandoned all hopes and dreams, the lonely princess slowly begins to confront the meaning of living once more. A drowning-in-love fantasy about a possessive demon king and a forgotten, isolated princess whose fates intertwine.