She chose a convenient man—or so she thought!? A sweet, slightly erotic, forbidden love story that begins from a false master-servant relationship. Princess Ariel is trapped in the cage of the royal palace, subjected to the bizarre obsession of her uncle, the king. She harbors a "secret" that must never be known: she carries the blood of a "succubus," possessing an irresistible urge to drain life force! To resist her instinctive desires, Ariel designates a beautiful soldier, Diet, as her obedient "knight" who also serves her bedchamber needs. "I'll grant you everything you wish for." Diet accepts all of Ariel, kneeling before her sweetly and passionately. However, this perfect knight also hides "a certain secret"...!