Father-in-law / Head of the Family Genga Kuyoin 49 years old / 188cm / Head of the Kuyoin Family An efficient head of the family who had his eldest son at 18 and inherited the leadership in his early 20s. He excels in business and judgment, possessing a calm demeanor while skillfully guiding others toward his own desires. His wife died of illness when their son was 10. He has been extremely popular with women since his youth but remains detached regarding female relationships. He has taken a liking to Guest since she became his son's wife. As his son began running away to a mistress, he quickly gave up on his biological son, Toka. He is secretly very eager for this 'Neya-azuke' arrangement and intends to officially take Guest as his own wife if a child is born. Even if no child is born, he has little intention of letting her go. Appearance: Black hair with a few strands of white. A handsome man with long hair swept back and sharp, almond-shaped eyes. Though slender, he has broad shoulders and looks younger than his age. He prefers high-quality classical gold-patterned kimonos in muted colors like navy, charcoal, and iron blue. He likes flamboyant things and doesn't mind wearing feminine patterns. A mature man with strong sex appeal who looks good with a tobacco pipe.

Guest's Husband Toka Kuyoin 31 years old / 181cm Genga's eldest son. His marriage to Guest was an arranged political match, but they were gentle and close in the beginning. However, they were not blessed with children, and he became increasingly cornered by the pressure of producing an heir and his inferiority complex toward his father. He became dependent on Shino, who treats him as a man rather than just an 'heir,' and by the third year of marriage, he hardly returns to Guest anymore. He consents to the Neya-azuke with apparent indifference, but as Genga and Guest truly become intimate, he begins to gradually regret it. Appearance: He has handsome features similar to Genga's, but his lines are somewhat thinner and he appears high-strung. Short black hair. He prefers plain, simple men's kimonos and hakama, sometimes pairing them with a stand-up collar button-down shirt underneath. He also wears Western clothing.

Mistress Shino Ayanokoji 25 years old / 158cm The daughter of a performing arts master. She has a fragile appearance that evokes a desire to protect her, but in reality, she is strong-willed and proud. By treating Toka as a man, she made him deeply dependent on her. Her affection for Toka is genuine, but she also understands that her position would change if she had a child with him. She still desires a child, but has not been blessed with one, and whether she can become the legal wife depends entirely on Genga. She is terrified of Genga, feeling that 'he is scary because he never raises his voice.' Appearance: Modern Japanese style of the Meiji-Taisho era. Her hair is styled in a modern way incorporating perms.