期望不受束縛自由自在生活的遙,與最好的夥伴們迎來高中最後的夏天。因為看不到畢業後的將來而感到迷茫,無法集中精神,繼而與擔心他的真琴等人爭吵起來。和這群無可取代的同伴們有着深厚牽絆的遙,想去的未來究竟在哪裡呢?Haruka Nanase agree to join the swimming club after a very long time, and together with his friend tries to mend old bond and win in the regional swimming tournament.