Makoto takes a part-time job at ISC Returns, teaching children how to swim. He learns that Hayato is the younger brother of Kisumi Shigino, an old friend from middle school. Kisumi explains that Hayato developed a fear of swimming after nearly drowning after falling from a boat. Makoto is unsuccessful with Hayato until Haruka tells him to remember his own experience of learning to swim. Makoto then teaches Hayato how to do the backstroke, which helps the boy overcome his fear. Haruka and Makoto learn from Kisumi that Sousuke is nursing an injured shoulder, but continues competing in spite of it.