Loyal Soldier, Lustful Beast (Light Novel)

Noblewoman Giselles world is turned upside down when shes summoned to serve as the kings prized concubine. Her heart already belongs to her manservant, Wallace, a soldier who worships the ground she walks on. Just as Giselle accepts that their blissful days are numbered, Wallace steals into her room in the palace with a desperate, hungry gaze. Spending the night with him is tantamount to treason but their love is not one so easily denied.