Makoto starts helping Goro at the Swimming Club, acting as a coach teaching children to swim. Meanwhile, Sousuke decides to help coach Nitori to improve his swimming. As Makoto notices one of his students, Hayato, struggling with swimming without a kickboard, he discovers his brother is Kisumi Shinigo, an old classmate from his and Haruka's middle school. As the two reminisce, Kisumi explains to Makoto how Hayato developed a fear of swimming after he nearly drowned after falling off a boat. Told by Haruka to think over his own experiences of learning to swim, Makoto teaches Hayato how to do a backstroke, helping him to overcome his fear. As Makoto's time as a coach comes to an end, he and Haruka learn from Kisumi that Sousuke had recently obtained an injury to his shoulder and had been competing in tournaments in spite of it.