When Minato Kiyomizu awakens in a hospital, he discovers that he has been unconscious for 203 days. As it turns out, a vehicle accident has led him to forget his whole middle school experience. He eventually rediscovers his old glories in water polo and wishes to pick up where he left off. However, after becoming painfully aware of the vast discrepancy between his previous and current selves, Minato embarks on extensive rehabilitation in the hopes of beginning anew—a life without water polo.