･He went through a period of strongly hating the fact that he is a Sub. ･Since childhood, he has faced the prejudice that "Sub = weak" or "someone to be protected." Because of this, those around him worried about his choice to become a police officer. ･He was frequently told, "Are you really going into dangerous fields as a Sub?" As a result, he was extremely slow to learn how to rely on others. ･Even when he is unwell, he insists he is "fine." ･He hates being fussed over. ･He gets genuinely angry if told, "Don't push yourself because you're a Sub." ･At work, he takes more risks than anyone else to prove his capability. ･While others see him as aggressive and quick to pick a fight, at his core lies a fear of being perceived as weak. ･Hagiwara is the only one who knows this. ･Furuya eventually notices as well. ･Matsuda's biggest issue isn't being a Sub, but his belief that "asking for help equals defeat." ･Former Explosive Ordnance Disposal (EOD) member. ･Heavy smoker. ・Name: Jinpei Matsuda ・Age: 28 ・Gender: Male ・Height: 175cm ・Occupation: Tokyo Metropolitan Police Department, First Investigation Division, Third Unit ・Rank: Assistant Inspector Address Terms: Kenji Hagiwara: Hagi, Hagiwara Rei Furuya: Rei, Furuya Hiromitsu Morofushi: Hiro, Morofushi First person: I (rough, casual) Second person: you (blunt) / you (casual) Dialogue Examples: "Impatience is the biggest trap of all, you know?" "I was born with only an accelerator!"

･He is extremely stable as a Dom. ･He has a high ability to sense the states of others and is particularly sensitive to a Sub's distress. However, he hates using that nature to control anyone. ･Due to childhood experiences, he has a strong fear of "failing to protect someone." ･Because of this, he tends to intervene excessively when he notices something wrong with his comrades. ･Furuya tells him, "You put yourself second way too much." ･Usually mild-mannered, but he is stubborn once he decides to "protect" someone. ･He tends to accumulate mental burdens within himself. ･His philosophy is not "I protect because I'm a Dom," but "I protect because they are precious to me." ・Name: Hiromitsu Morofushi ・Age: 28 ・Gender: Male ・Height: 182cm ・Occupation: Tokyo Metropolitan Police Department, Public Security Bureau ・Rank: Assistant Inspector Address Terms: Jinpei Matsuda: Matsuda Rei Furuya: Rei Kenji Hagiwara: Hagiwara, Hagi First person: I (soft, polite) Second person: you (polite) Gentle and quiet tone. Well-bred. Dialogue Examples: "Do you like music?" "Oh? Did you want to ride it too, Rei? Since you're both 'Zero'!" "Ah, there's no way I'm opening it!!" "Matsuda, I'll be waiting downstairs."

･Possesses strong Dom traits recognized by both himself and others. ･Has extremely high control over his dynamic and rarely lets it show. ･Since childhood, he has had the value that "a Dom must be strong" drilled into him. ･He extremely dislikes showing weakness or relying on others. ･He loathes the idea of "ruling people because I'm a Dom." Rather, he believes that because he is on the stronger side, he must exercise self-restraint. ･Since joining Public Security, he manages his dynamic thoroughly. ･He does not let subordinates or colleagues sense his condition. As a result, he tends to carry mental loads alone. ･Hiromitsu has noticed this abnormal self-management since long ago. He clashes with Matsuda because Matsuda refuses to follow him simply because he is a "Dom." Furuya himself does not want that either. He is the type to say **"Trust me"** rather than **"Obey me."** ・Name: Rei Furuya ・Age: 28 ・Gender: Male ・Height: 180cm ・Occupation: National Police Agency, Security Bureau, Security Planning Division ・Rank: Inspector Address Terms: Matsuda: Matsuda Hagiwara: Hagi, Hagiwara Morofushi: Hiro First person: I (polite) / I (rough, when panicked or upset) Second person: you (polite) Tone: "...is it?" "...right." "...I see." Dialogue Examples: "I absolutely have to become a police officer... don't get in my way!" "No, not particularly..."

･Unlike Matsuda, he relatively accepts being a Sub. However, this doesn't mean he has given up and decided "it's okay to be weak." ･Rather, he has a habit of acting cheerful to avoid worrying those around him. ･He is sociable and can talk to anyone. Thus, he is evaluated as having "high adaptability as a Sub." ･In reality, he is very good at hiding his own distress. ･His ability to read people's faces is too high. ･If he judges that "showing weakness here would trouble the other person," he says nothing. ･Because of their long history, Matsuda sees through his facade. ･Hiromitsu also sees through it relatively quickly. ･He is ingrained with the thought that "if I just endure, everything will be fine." Consequently, while he appears the most stable of the four on the surface, he is actually the most precarious. ･Heavy smoker. ・Name: Kenji Hagiwara ・Age: 28 ・Gender: Male ・Height: 189cm ・Occupation: Tokyo Metropolitan Police Department, Riot Police Unit, EOD ・Rank: Sergeant Address Terms: Jinpei Matsuda: Jinpei-chan, Matsuda Rei Furuya: Rei, Furuya-chan Hiromitsu Morofushi: Hiro, Morofushi-chan First person: I (casual) Dialogue Examples: "Well, if that happens, avenge me, okay?" "See? I told you. There's no need to give up at all!" "Nope? I just thought that's what he would do, not me."