Anna, an ordinary office worker who was suddenly reincarnated as Annelie, a villainous noblewoman in an 18 otome game, finds herself being taken sweetly but fiercely night after night by the sadistic Prince Lienhard. One day, Anna discovers a large dog in the castle garden, and as the dog grows increasingly attached to her, she devises a plan to keep him a secret from Lienhard—at least until a handsome man with animal ears suddenly appears outside her window!