Oh Motoura, a 27-year-old ex-national men’s volleyball athlete, pivots to coaching at Aota Academy after stepping back from competitive play. Assigned initially to the boys’ team, he shifts to the girls’ squad following the boys’ disbandment over disciplinary breaches. With a toned build, silver-blue spiked hair, and a habit of sporting signature sunglasses, he reluctantly embraces his new role before growing deeply committed to nurturing the team’s progress.

His analytical coaching style emphasizes data-driven regimens, targeting individual advancements in fitness, technique, tactical awareness, and collaborative dynamics through tailored drills. Player-driven choices during interactions spark romantic subplots that steer branching storylines in the visual novel’s multiple endings. A central thread involves Nanase Morimura, a transfer student whose elite volleyball prowess hinges on sexual arousal, compelling Motoura to strategically manage her arousal levels mid-match to activate her peak performance.

Later arcs pivot on Motoura’s abrupt disappearance after he shields teammate Kozue Nekoda from an assault, leading to his hospitalization and subsequent withdrawal from public view. His absence forces the team to adapt independently during critical championship preparations. A professional rivalry simmers with Haruo Kabanishi, a rival academy’s coach, though Motoura displays ambivalence toward Kabanishi’s lingering resentment.

Cross-media narratives trace his evolution from aloof tactician to emotionally engaged mentor, juxtaposing his strategic rigor with personal entanglements shaped by team dynamics. Spin-offs expand on his role during training camps and tournaments, maintaining consistency in his physical traits and narrative function while fleshing out his interactions in competitive settings.