Keisuke Kotaka stands as Hiro Aida’s closest friend. His world orbits around romantic pursuits, constantly chasing after girls despite facing rejection after rejection. Undeterred by failure, he persistently initiates interactions with unwavering optimism. This fixation extends to voyeuristic habits, where he actively hunts for opportunities to steal revealing glances at female classmates. Such behavior underscores a noticeable immaturity when contrasted with Hiro.

Outside his romantic endeavors, Keisuke channels fervent enthusiasm into collecting Cyber X action figures and indulging his deep passion for anime. This hobby seamlessly blends into his school life through active membership in an anime-focused club.