The story is about Hiromi Oka (岡ひろみ, Oka Hiromi), a high school girl who struggles to become good at tennis. While attending Nishi (西高), Hiromi begins playing tennis after becoming fascinated by Reika Ryūzaki (竜崎麗香, Ryūzaki Reika), an older girl who is the best player on the team and is nicknamed "Madame Butterfly" (お蝶夫人, Ochōfujin) owing to her grace on the tennis court. The team gets a new coach, Jin Munakata (宗方仁, Munakata Jin), who sees potential in Hiromi and trains her to become a great tennis player.