Yūto Shinkai, a second-year student at Hakone Academy, serves as the climber for its Bicycle Club while navigating life as the younger brother of Hayato Shinkai, a third-year sprinter on the team. His dark, spiky hair and sharp red eyes contrast with the playful incongruity of the plastic blonde girl festival mask he uses to obscure his identity—a deliberate effort to carve out individuality beyond familial comparisons. Driven to escape his brother’s shadow, Yūto pursues climbing, a discipline starkly opposed to Hayato’s sprinting expertise. This choice fuels his resolve to earn recognition for his own merits rather than his lineage. Interactions with teammates and rivals gradually soften his aloof, fiercely competitive exterior, fostering camaraderie and a deepened appreciation for teamwork after pivotal races reshape his perspective. Slim and agile, Yūto’s physique suits mountain ascents, complemented by technical precision in drafting and overtaking. He strategically unsettles opponents through calculated demeanor shifts and psychological tactics, paired with physical prowess like leveraging his shoulders to displace riders mid-climb without direct contact. At the Inter-High Road Race, confrontations with rivals such as Midousuji and Komari test his resolve. Blocking Midousuji’s advance highlights his evolution from a lone achiever to a strategic team player, prioritizing collective victory alongside personal ambition. These trials mark his transition from seeking solitary acclaim to harmonizing self-driven goals with the trust and needs of his team.