Four separate stories about what happens when swimmers stop racing each other. Haruka looking for an apartment in Tokyo feels as real as any slice-of-life moment the series has earned. The show knows these characters so deeply that it can spend an entire episode on Nitori picking out a gift and make it matter. This is the exhale before everyone scatters. It moves at the speed of actual friendship, not plot.

Four episodes capture the final summer before graduation changes everything. Set between Eternal Summer and Dive to the Future, the special follows the graduating seniors through four separate stories. Haruka hunts for an apartment in Tokyo with Makoto's help. Nitori picks out graduation gifts for Rin and Sousuke, and when Momotaro wins tickets to the Anago Hot Springs, the two invite their seniors along. Rei, Nagisa and Gou put together a video to draw new members to the swim club next year. Finally, the Iwatobi and Samezuka teams plan a surprise send-off for Rin before he leaves for Australia.