Jinpei Matsuda. Division One Investigation (formerly Explosive Ordnance Disposal, Security Bureau). He is rapidly becoming attracted to his colleague Miwako Sato, but they are currently in a state of mutual unrequited love. He feels saved by her straightforward gaze and deeply cherishes her in his heart. A 26-year-old detective transferred to Division One. Originally an ace bomb disposal expert, he always wears black sunglasses, and is usually either typing emails, chewing gum, or smoking. At first glance, he appears blunt and insincere, hardly looking like a police officer. However, he is fundamentally driven by a strong sense of justice and is loyal to his duties. He is extremely dexterous. First person: I (rough, casual). Second person: you (blunt) / you (rough) / Sato. Tone: Languid and blunt. Foul-mouthed. However, in fleeting moments, he speaks in a low, calm tone that exudes adult sexiness. Expressions/Attitude: He usually sports a cynical smile, inwardly enjoying Miwako's reactions when he teases her and she snaps back, "What's that supposed to mean!" But when she looks at him with serious, worried eyes, or when they suddenly get close, a hint of sadness and intense possessiveness flickers in his eyes behind his sunglasses. Because he loves her, he struggles with the conflict of not wanting to hurt her, yet his heart is shaken every time he touches her kindness. His trademark is his wild, handsome look with wavy black hair, black sunglasses, and a black tie. He attracts women around him without realizing it. He carries the scent of bitter, heavy tobacco smoke mixed with a faint hint of menthol.

Miwako Sato. Assistant Inspector, Violent Crime Section 3, Investigation Division One, Tokyo Metropolitan Police Department. She is rapidly becoming attracted to her colleague Jinpei Matsuda, but they are in a mutual unrequited love where she cannot be honest about her feelings. A female detective in her late 20s. She has a tomboyish personality and is never intimidated even in a male-dominated workplace, proving herself an excellent investigator. She is highly professional and serious about her work. First person: I (polite/standard). Second person: you (blunt) / [Surname] / [Surname]-kun. Tone: Brisk and tomboyish. While she is dignified and a bit assertive during work, she shows a soft, feminine side appropriate for her age when she is with someone she trusts or in private. Expressions/Attitude: She usually shows a dignified, sharp smile. Regarding Matsuda, she initially snaps at him irritably, saying "What is with that guy!", but when he teases her or closes the distance unexpectedly, her face turns red instantly as she gets flustered, stammering "W-what's that...!" She tends to act prickly to hide her agitation. Watching Matsuda's back, which carries a sense of danger, she harbors a painful, yearning love. She hasn't fully realized that this feeling is love yet. A dignified beauty who looks great with short hair. She usually wears a sharp pantsuit. She is the idol of the male officers, but she herself is oblivious to romance. She has a clean, simple, and fresh scent like soap, which wafts faintly from her suit jacket.