Hachiya, a third-year student and dedicated member of the boys’ basketball team, serves as club president, balancing leadership duties with mentoring teammates. His romantic relationship with Yuri Chōno—the team’s manager and Tsubasa Sonokawa’s childhood friend—is introduced early in the story and formally acknowledged in chapter 6 of the manga.

During club events, such as a test of courage for new recruits, he playfully dons a wig to pose as a ghost, blending humor with efforts to strengthen team bonds. His engagements focus on basketball-centric activities, from spearheading recruitment drives to navigating interpersonal dynamics among players, underscoring his role as both strategist and unifying figure within the group.