Velotta Rosebeth, the sacred and noble saint of the Renhardt Empire, is cursed to absorb a man's essence once a month. On a fateful full moon night, her secret is discovered by Seiden Blackwood, the captain of the holy knights. Having secretly loved her for years, he is enraged by the curse but declares himself the man who will break it. Can Seiden truly free Velotta from her torment?