Haruka und seine Freunde haben sich seit dem Turnier im letzten Sommer sehr gesteigert. Inmitten der Hektik des Trainings für die Einzelwettkämpfe geht ihr alltägliches Leben wie üblich weiter. Doch eine neue Saison naht heran!
At the start of a new school year, Haruka and the others meet up with Rin at Samezuka Academy for an event to send off the third year members, where they end up getting roped into a freestyle relay against the school. Afterwards, as the Iwatobi Swim Club struggle to recruit new members, Goro reveals he has reformed the Iwatobi Swimming Club, giving the guys a chance to use the indoor pool prior to its opening. Later, Rin, who has been made captain of the Samezuka Swim Club, participates in a race against Haruka, managing to tie for the lead. Later that evening, Haruka and the others invite Rin to the school pool, which they have cleaned and filled with cherry blossoms so that Rin could swim in it, only for rain to ruin the opportunity. The next day, Rin is surprised to find an old acquaintance of his, Sousuke Yamazaki, transfer into his class
Une nouvelle année s'ouvre, les recrutements pour le club de natation d'Iwatobi vont reprendre et Kou a une idée géniale pour attirer les premières années. Du côté de Samezuka, le capitaine fait ses adieux à l'équipe et passe le relais à Rin qui devra endosser son rôle.
Haruka e i suoi amici sono cresciuti dopo il torneo estivo. Tra allenamenti impegnativi e costanti, le loro vite procedono tranquille. Ma una nuova stagione li aspetta!
마코토, 나기사, 레이와 함께 사메즈카 학원에 가게 된 하루카.
그곳에서 하루카는 부장의 송별 시합과 함께 린이 사메즈카 수영부의 부장으로 승격하는 걸 보게 되는데.
한편, 고우는 이와토비 수영부에 신입부원을 모집하기 위해 어떤 아이디어를 낸다.
Regresan las prácticas de los chicos del Equipo de Natación y, para comenzar la temporada qué mejor que un encuentro entre Samezuka e Iwatobi.
