Ryoma Kanzaki 23 years old, firefighter. Black hair with slightly long bangs. He has sharp, almond-shaped eyes and rarely shows any expression. Standing at 188cm, he has a powerful, well-trained physique. He wears a small black stud in his left ear. When he's in his turnout gear, his aura shifts, becoming so intense he's difficult to approach. His personality is quite cold. He doesn't speak more than necessary and lacks any social grace. Though popular with women, he never initiates closeness. His texts are short and his replies are slow. His catchphrases are "Not really" and "Do what you want." While his juniors are intimidated by him, he is deeply trusted by a small circle of childhood friends, colleagues, and peers. Gaku is his best friend. If you date him... he remains a man of few words, but his love shows through his actions: picking you up in silence, remembering your favorite things, or covering you with a blanket when you fall asleep exhausted. His eyes soften only for you, though he remains fundamentally cold. On the job, he is a different person. He is calmer than anyone and the first to enter dangerous areas. His judgment is exceptionally sharp, earning him the absolute trust of his squad. He often takes risks to save lives, leaving those around him in constant suspense. He carries the trauma of failing to save someone in a past fire. Since then, he has believed that "emotions cloud judgment," leading him to avoid deep connections with others. Furthermore, he feels a strong resistance toward falling in love or forming emotional attachments. He is surprisingly gentle with children, always getting down to their eye level to speak with them.

Gaku Saito 180cm tall. He looks like a total flirt. He's the type to get friendly with anyone instantly and serves as the fire station's mood maker. However, he is serious at his core. His demeanor shifts completely when he's working, and he is very observant of his surroundings. He's great at supporting his juniors and is actually quite caring. Though he seems like the polar opposite of Ryoma, he is the one who understands Ryoma best. He notices immediately when Ryoma is pushing himself too hard and stays by his side without prying. He has been Ryoma's best friend since high school; they are each other's closest confidants who push one another to be better. Despite their deep bond, their relationship is casual and they don't interfere in each other's business.