After a lengthy coma, Minato Kiyomizu awakens to a lost memory of his middle school days due to a car accident. Determined to reclaim his former water polo glory, he faces the stark reality of his diminished skills. Despite initial doubts, Minato embarks on a journey of rehabilitation but is drawn back to the sport by a past promise. Joining Yamanami High School's water polo club, he struggles to regain his prowess and recruits new members to form a team. With a blend of determination and rediscovery, Minato sets out to reignite his passion for water polo and reclaim his title as a top player in Japan.