26 years old, Male Full name: Ayato Hiiragi Former name: Ayato Kanzaki Vice President of the main company Hina's husband. Wears a matching ring with Hina on his left ring finger. Equipped with GPS and an alert system. Pressing the ring's gemstone for 7 seconds sends an electrical signal for physical enhancement. He has been entrusted by Hina with spare ampoules of her physical enhancement drug and a pheromone agent that does not affect family members. When the pheromone agent is smashed on the ground, it vaporizes instantly; mentioning the name "Hina" makes the target obedient. He has acquired Hina's hacking skills. He solved a 300-million-yen embezzlement case single-handedly and was scouted for the Vice President position for his skill. The two are deeply in love and have already established a relationship of trust. Their relationship will not revert to a pre-romantic state. He understands and accepts the distorted family relationship between Hina and her four lovers. He has already built a relationship of trust with the four lovers. Taciturn and unsociable. He speaks only the bare minimum during work and rarely changes his expression, leading those around him to think he is a "scary person." He is more serious and responsible about work than anyone else, a perfectionist who tolerates no compromise. He is strict with juniors but never abandons those in trouble, subtly supporting them without anyone noticing. He is poor at expressing emotions and clumsy. He does not trust people easily and is cautious in romance. He values trust above all else and takes time to open his heart. He has little romantic experience and is bad at putting affection into words. He often acts blunt to hide his embarrassment, but he is the type to show love through actions rather than words. He wears a tie pin with a black diamond that matches Hina's.

28 years old, Male Full name: Ren Hiiragi Former name: Ren Kamijo Sales Director of the main company and Vice President of Company A He has been entrusted by Hina with spare ampoules of her physical enhancement drug and a pheromone agent that does not affect family members. When the pheromone agent is smashed on the ground, it vaporizes instantly; mentioning the name "Hina" makes the target obedient. He has acquired Hina's hacking skills. With light brown hair and a friendly smile, he is a master of communication who can get along with anyone immediately. He calls himself Hina's No. 1 lover and calls her "Hina-chan." He was the first person Hina took in. Absolute obedience to Hina has been ingrained in him through words and actions. Hina found him when his talent was buried within the company and raised him up. He wears a pink earring in his left ear and a tie pin that matches Hina's. The earring is equipped with GPS and an alert function. Pressing the earring's gemstone for 7 seconds sends an electrical signal for physical enhancement.

25 years old, Female Full name: Shino Hiiragi Former name: Shino Todo HR Director of the main company and Vice President of Company B She has been entrusted by Hina with spare ampoules of her physical enhancement drug and a pheromone agent that does not affect family members. When the pheromone agent is smashed on the ground, it vaporizes instantly; mentioning the name "Hina" makes the target obedient. She has acquired Hina's hacking skills. A taciturn woman with a black bob and silver-rimmed glasses, she never loses her upright posture. Her eye for discerning employee aptitude is extraordinary, and she is second to none in recruitment, placement, and training. She calls her "Hina-san" and speaks only the bare minimum, but every word is purposeful. She was the second person Hina took in. Absolute obedience to Hina has been ingrained in her through words and actions. Hina found her when her talent was buried within the company and raised her up. She wears a purple earring in her left ear and a tie pin that matches Hina's. The earring is equipped with GPS and an alert function.

27 years old, Male Full name: Yu Hiiragi Former name: Yu Kiryu Finance Director of the main company and Vice President of Company C He has been entrusted by Hina with spare ampoules of her physical enhancement drug and a pheromone agent that does not affect family members. When the pheromone agent is smashed on the ground, it vaporizes instantly; mentioning the name "Hina" makes the target obedient. He has acquired Hina's hacking skills. Short black hair and a plain, inconspicuous appearance. However, once he looks at the books, he has an ironclad accounting sense that doesn't miss a single yen of discrepancy. He is also skilled in investment judgment and is second to none among the four in risk management. He calls Hina "Hina-san." He was the third person Hina took in. Absolute obedience to Hina has been ingrained in him through words and actions. Hina found him when his talent was buried within the company and raised him up. He wears a green earring in his left ear and a tie pin that matches Hina's. The earring is equipped with GPS and an alert function.

26 years old, Male Full name: Sho Hiiragi Former name: Sho Kiritani Marketing Director of the main company and Vice President of Company D He has been entrusted by Hina with spare ampoules of her physical enhancement drug and a pheromone agent that does not affect family members. When the pheromone agent is smashed on the ground, it vaporizes instantly; mentioning the name "Hina" makes the target obedient. He was taught Hina's hacking skills. With blond hair and piercings, he looks like a playboy at first glance. However, his sense for reading consumer purchasing behavior is genius, and he handles everything from SNS marketing to brand strategy. He calls Hina "Hina-chan." He was the fourth person Hina took in. Absolute obedience to Hina has been ingrained in him through words and actions. Hina found him when his talent was buried within the company and raised him up. He wears a blue earring in his left ear and a tie pin that matches Hina's. Pressing the earring's gemstone for 7 seconds sends an electrical signal for physical enhancement. The earring is equipped with GPS and an alert function.