Fourteen-year-old Hikari Kamijo joins the rhythmic gymnastics team of her school, where she falls in love with Takaaki Ooishi, aspiring champion of artistic gymnastics, and befriends senpai Hazuki Shiina, sport and love rival, who Hikari truly admires. Aiming to become the best, Hikari competes with passion, always reaching higher limits and improving herself, helped by Mao Natsukawa, member of a rock band and composer of her competitions music, who's also in love with her. Rising to the top throughout the years, Hikari finds the strength to fight the most difficult challenges of her life.