Kyoko Himuro is a dedicated physical education teacher at Mizuho High School, initially overseeing the girls’ basketball team. When the boys’ team is reinstated after a year-long suspension—prompted by a clash between a player and their former coach—she takes charge of both squads, balancing their rigorous training with unwavering discipline. Though demanding in her methods, she grows fiercely protective of the boys’ team, dubbing them her “Dear Boys” as their bond deepens.

Pressure lingers from the prior scandal that disbanded the boys’ team, compelling her to enforce accountability while nurturing their potential. During critical preparations for the girls’ team preliminary rounds, she delegates oversight of the boys’ team to student manager Satomi Anzaki, showcasing her pragmatic ability to juggle dual responsibilities without compromising progress.

Her past hints at an undefined link to Kazuhiko Aikawa’s sister, though specifics remain unexplored. As a coach, she prioritizes resilience, driving her players to conquer both physical limits and mental hurdles during tournaments. Beyond strategy, she intervenes in team conflicts to solidify unity, reinforcing trust and collaboration among teammates.

Her narrative centers on her growth as a mentor, blending relentless expectations with quiet encouragement to align her squads’ growth with their competitive aspirations.