Natsuza Yuzuki has played rugby as a left-winger since childhood. After joining Doushisha University, he rapidly emerges as a rising star in the Kansai University League. His dreams are shattered, however, when a severe motorbike accident leaves him with a spinal hernia—rendering him unable to play rugby again. With no role available other than manager, he accepts the position and hopes his team can win a league title. Yuzuki's team is an unlikely group, including his stoic best friend and full-back Seiichirou Jingyouji; hot-headed first-year Yasunari Tsuru, who harbors a strong dislike for Natsuza and fills his senior's old position as left wing; and Yuu Mashiro, who is struggling to hold his ground as a scrum half. Despite Natsuza putting his all into training his team for a league title, their squad still feels incomplete. A year ago, Ibuki Ueka, the genius fly-half who was once Doushisha's ace, suddenly quit rugby—and now Natsuza is determined to get him back.