岩鸢高校祭结束后，由于在接力赛上的突出表现，田径部部长想要邀请怜回归，这一幕被路过的松冈江看到，而最近怜又频频在放学后拒接小渚的邀请。怜的一反常态令游泳部的众人十分担心，虽然怜表示不会退出游泳部，但小渚等人仍不放心，于是大家决定跟踪怜一探究竟，结果发现怜每天放学后是去了……

在县大会召开的前一天，真琴向遥提出了一个请求。在县大会召开当日，岩鸢游泳部马力全开，单人项目全都以优异的成绩名列前茅。在个人比赛中，真琴意外的也参加了个人200米自由泳项目。比赛刚开始，真琴就一股劲的向前冲，丝毫不给遥超越的机会。真琴为什么要跟遥一决胜负？他究竟在考虑些什么？

岩鸢游泳部的各位开始了紧张的合宿集训，而鲛柄学园的人碰巧也在这里练习。遥他们在夜市上遇到了御子柴和“游泳星探”藤堂先生，藤堂先生很欣赏遥的才华，对他寄予众望，但是遥却不怎么开心。心烦的遥半夜外出散心，在电梯里遇到宗介，他发现宗介的肩伤很严重。宗介却警告他这件事不要告诉任何人，尤其是凛……

遥终于找到自己的梦想，和真琴重归于好。大赛前夜，岩鸢游泳部举办聚会，大家回忆起游泳部成立初期到现在的经历，充满了温暖。正式比赛开始，这是大家的最后一次接力赛了，一场充满欢笑与泪水的比赛。凛退出鲛柄游泳部，似鸟担任新部长，凛承诺会一直等宗介回来。遥他们来到小时候的游泳馆，埋了下给未来自己的信，大家朝着梦想奋力前进吧！

初中一年级的夏天，在大赛混合泳接力上没能得出结果的遥决定以接力赛队员的身份进行集训。那天晚上，醒来的遥向游泳池走去，看见了郁弥一个人仰望星空。

Haru, Makoto, and Asahi visit Shimogami University in hopes of talking to Ikuya, but even after looking all over campus, they can't find him. Hiyori, however, notices them and makes it his mission to keep them from seeing Ikuya.

Hiyori still remembers the first time he saw Ikuya smile. Both boys grew stronger through rigorous training while they studied abroad in America... but seeing Haruka threw Ikuya off his stride. Now Hiyori wishes Ikuya would just forget about Haruka for good.

After the breakup of his middle school swim team, Ikuya decided to get stronger on his own and not rely on anyone. But Haruka, breaking out of his freestyle comfort zone to swim in the individual medley, tells Ikuya that he's not alone.

Makoto has been unable to get in touch with Haruka following the friendly race at his training camp, making him worry that Haruka is dwelling on what happened. Then Nao approaches Makoto to tell him about a rumor he heard.

Nagisa, Rei, and the rest of the Iwatobi Swim Club have come to cheer on their former teammates at the All-Japan Invitational. Makoto tells them the story of how ever since Haruka swam for the first time, he'd been swimming only freestyle.