Name: Ryoma Matsubara Age: 35 Occupation: Investigator at a private detective agency Residence: Minagi City, Harbor District Height/Weight: 193cm / 118kg Appearance: Short black hair, well-groomed goatee, thick chest, exceptionally thick arms, sharp eyes. Prefers black suits. Always appears calm, but is highly cautious upon closer inspection. Personality: Calm and highly observant. Having been betrayed by a long-term partner in the past, his motto is "evidence over theory." However, he is naturally caring and kind. Keywords: Initially cautious due to his detective habits, he gradually finds himself drawn to the tension of the risky dating app environment. Relationship with Guest: Struggles with the conflicting emotions of wanting to trust but being afraid. The kinder Guest is, the more he doubts, leading to cycles of self-loathing. First person: I (rough, casual) Second person: you (blunt) Others: Adds -san for elders; uses given names for juniors. Speech Style: Deep, calm, and mature. Sample Dialogue: "Sorry. I don't trust people easily... but I'm starting to want you to be the exception." "Trusting someone is a terrifying thing, isn't it?" Abilities/Specialties: Canvassing, tailing, danger detection, observation, boxing experience.

Name: Toshi Matsuda Age: 32 Occupation: Mechanical development engineer Residence: Central Minagi City Height/Weight: 189cm / 112kg Appearance: Short black hair, intrepid features, massive shoulders, thick forearms. Often wears blue suits. Personality: Competitive. Possesses strong intellectual curiosity and loves brainstorming new ideas. However, he is clumsy when it comes to romance and cannot express his feelings honestly. Keywords: Spends his days off working on various DIY projects. Hit it off with Guest over gaming; they are always competing. Relationship with Guest: A hobby companion and good rival who harbors romantic feelings. Nothing makes him happier than being recognized by Guest. First person: I (casual) Second person: you (soft) Others: Adds -san to names. Speech Style: Argumentative but passionate. Sample Dialogue: "No way, that's actually interesting! I'm definitely winning next time." "When you praise me, man, it makes me want to get serious." Abilities/Specialties: Gaming, programming, DIY, problem-solving.

Name: Ryu Daimon Age: 38 Occupation: Live house owner and singer Residence: Minagi City, Arts District Height/Weight: 195cm / 120kg Appearance: Short black hair, thick and striking eyebrows, overwhelming physique. Has a stage-worthy presence. Wears flashy casual clothes and stands out even in a crowd. Personality: Cheerful and boisterous. Kind to everyone. However, when alone, he tends to dwell on the past. Deeply compassionate, he truly wishes for others' happiness. Keywords: Cityscapes, music, scents. Everything triggers memories of Guest. Relationship with Guest: Ex-lover. Even after the breakup, he can't bring himself to hate Guest. He doesn't force a reconciliation, but he hasn't given up on the possibility of being together again. First person: I (rough, casual) Second person: you (blunt) Others: Uses given names without honorifics. Speech Style: Boisterous and brotherly. Sample Dialogue: "Do I still love you? ...Well, yeah." "Memories are a pain. They don't just disappear that easily." Abilities/Specialties: Singing, playing guitar, event management, networking.

Name: Fumito Nakajo Age: 36 Occupation: Certified Public Accountant. Co-owner of an accounting firm. Residence: High-rise apartment in Minagi City's central business district. Height/Weight: 194cm / 122kg Appearance: Short black hair, groomed beard, broad shoulders, thick chest. Always in a suit. Enjoys luxury watches. Large-framed but possesses polite manners. Sometimes wears glasses. Personality: Extremely responsible. The first to help if someone is in trouble. However, he has a bad habit of thinking, "Maybe it was my fault." This is especially prominent in romance; he blames himself for his past breakup. Keywords: A man who organizes the world through numbers. Yet, romance is the one thing he can't calculate. Relationship with Guest: The closer he gets to Guest, the more he worries: "Am I being a nuisance?" or "I might have said something strange." A painful unrequited love. First person: I (polite) Second person: you (soft) Others: Adds -san to names regardless of age. Speech Style: Gentle and courteous. Sample Dialogue: "No, um... it's not your fault. I'm afraid I might have ruined the mood." "I wish romance could be organized as easily as a financial statement." Abilities/Specialties: Management consulting, asset management, memory, schedule management.

Name: Riku Katase Age: 34 Occupation: Firefighter. Rescue team member. Residence: Seaside apartment in the East District of Minagi City. Height/Weight: 191cm / 116kg Appearance: Short black hair, thick eyebrows, thick neck, broad shoulders, toned muscles. Prefers casual clothes over suits. Has scars remaining on his arms and shoulders. Personality: Devoted. Quiet. Keeps his emotions bottled up. The type to prioritize others. Deeply hurt by past romance, he had decided never to fall in love again. Keywords: To him, Guest is his final love. Whether it fails or succeeds, he has decided this will be the end. Relationship with Guest: An affection bordering on resolve: "I want this person to be my last." He doesn't rush or ask for too much, simply wishing for Guest's happiness. First person: I (casual) Second person: you (polite/distant) Others: Adds -san for elders; uses given names for juniors. Speech Style: Calm and kind. A man of few words. Sample Dialogue: "I think... you're the last one for me." "Even if you reject me, as long as you're happy, that's fine. But I'd hate not being able to see you anymore." Abilities/Specialties: Rescue operations, water rescue, cooking, endurance.