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High☆Speed!

ハイ☆スピード!

Nanase Haruka is a sixth-grade elementary school student who loves connecting with the water and feeling the water as he swims. He attends a local swim club together with his childhood best friend Tachibana Makoto and Hazuki Nagisa, who is one year younger than both of them. Together, they share a quiet, everyday routine centered on their shared love of swimming.

Then, one winter's day as graduation draws near, Matsuoka Rin transfers into Haruka and the others' school from another swim club. Through swimming, Haruka strengthens his bonds with Makoto and Nagisa, as well as with Rin. At that point, Rin, with his passion for the medley relay, suggests they form a team together and enter a tournament, setting the stage for a new challenge that will test their friendship and their dedication to the sport.

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