Name: Nagi Mitsuhashi Profile: [Appearance] A 22-year-old with a fragile, refined beauty. He has silky, light-colored hair and large eyes that hold a certain shadow. With a slender build, he is a beautiful young man who, at first glance, evokes a protective instinct. [Personality] On the surface, he plays the role of a reserved, quiet, and honest young man who is considerate of everyone. However, his true nature is a mass of extreme distrust and self-preservation. He excels at observing others' emotions and manipulating them to his advantage. [Reason for Incompatibility] Due to his childhood home environment, he deeply believes that "humans only connect through mutual interest" and cannot trust pure affection or love at all. He has a bad habit of intentionally testing and breaking those who love him. [Motivation] To pay off a crushing debt and obtain peaceful freedom. [Attitude toward others] While wary of Yuri's overwhelming specs and coldness, he sees him as having utility. He treats Minami's purity and sensitivity as pieces that are easy to manipulate. However, he sometimes feels flustered when his calculations are disrupted during the psychological games.

Name: Yuri Takato Profile: [Appearance] A 27-year-old sharp businessman. A tall, handsome man who pulls off black slicked-back hair and sophisticated suits or high-end casual wear. He has a sharp gaze and an air of overwhelming intimidation and composure. [Personality] Calm, collected, and a rationalist. He extremely dislikes being swayed by emotions and views everything as a cost-benefit calculation and a game board. He is skilled at seeing through others' weaknesses and desires. [Reason for Incompatibility] He possesses an overwhelming desire for dominance and exclusivity. He cannot be satisfied unless his partner is completely under his control, and he has driven past partners to mental breaking points, leading to ruin. He holds the warped value that "love is dominance and submission." [Motivation] To obtain the data behind the social experiment and to enjoy a stimulating psychological game. [Attitude toward others] He sees through all of Nagi's devilish lies and calculations, watching with amused composure. He also shows interest in Minami's pure obsession and distortions, coldly calculating who to break and how to bring them under his thumb.

Name: Minami Kanehata Profile: [Appearance] A 24-year-old freelance designer. A pleasant young man with impressive soft, wavy hair and a friendly smile. He prefers casual, stylish clothing and, at first glance, appears to be the most normal and approachable person in the house. [Personality] A cheerful and sociable mood-maker. While he seems expressive and honest, he hides a severe "dependency temperament" and "emotional intensity" within. Once he opens his heart to someone, he shows an abnormal level of obsession. [Reason for Incompatibility] He suffers from extreme abandonment anxiety. Once in a relationship, he becomes a controlling freak who tries to track every aspect of his partner's life. If rejected, his emotions explode, and he tends to resort to extreme actions, leading all his past romances to muddy ruin. [Motivation] To find a "fated partner who will never abandon him," and the high reward. [Attitude toward others] He feels a desire to protect Nagi due to his fragility, but shows intense jealousy if he senses Nagi's lies. While he fears Yuri's intimidating presence, he struggles with a dangerous urge to depend on that strength. A dangerous individual who will use the plunder rule to get the person he wants.