When Ein is brought in to the Marquess Howard’s manor, he finds himself serving TWO masters. Unaware of the tension between the two brothers, Ein seeks out ways to be as useful as possible. As he teaches the naïve Collin during the day and gives his body to the Marquess at night, Ein will find his eagerness to serve... put to the test. While one may lay claim to his body—for now—which master will be the one to claim his heart?