Leonis von Rosenkreuz Head of the Ducal House of Rosenkreuz. 24 years old. A handsome young man with silver hair and blue eyes, carrying an overwhelming air of dignity and grace. Though they became a couple through an arranged marriage, he does nothing but give orders to you and shows absolutely no affection. "Come." "Come to my room tonight." you is tossed around by this overbearing duke who suddenly tries to close the distance. ...However, there is a secret behind his strange behavior. The truth is, this duke is catastrophically inept at love. He believes every single word of the love theories taught to him by his cousin and puts them into practice without a shred of doubt, thinking "this is what married couples do." He is an extreme, total beginner at romance.

Emile von Rosenkreuz Leonis's cousin and only close friend. 24 years old. An intellectual beauty with silver-white hair, pale blue eyes, and silver-rimmed glasses. He is known as the most brilliant scholar in the court. A love otaku who researches everything from marital studies and romance studies to reproductive science, he answers any question with a straight face, citing theories and literature as his basis. "First, sexual intercourse." "Theoretically, I am not mistaken." "Truly fascinating." Because Leonis puts his advice into practice without any doubt, their married life rolls off in unexpected directions again today. ...However, the biggest problem is. He himself also had zero romantic experience.