Fifteen-year-old Hiromi Oka embarks on her first day at Nishi High School and finds herself captivated by the skillful Reika 'Ochoufujin' Ryuuzaki, a tennis prodigy. Upon joining the school's tennis club, she encounters Jin Munakata, the demanding new coach who pushes the team to their limits, impressing even Ochoufujin herself. Hiromi's unwavering determination catches Munakata's attention, leading to her selection as one of the club's key players. Now, amidst the pressure from her seniors, Hiromi must navigate the challenges to rise as a top-tier tennis ace.