Haruka, Makoto, Nagisa, and Rei swim in their individual events. Rin becomes irritated as he remembers watching them swim back in grade school. Afterwards, the four Iwatobi Swim Club members must prepare for the medley relay.

Coach Sasabe begins training the Iwatobi Swim Club for the upcoming tournament. Meanwhile, Rei is unhappy about the fact that he's the only one who doesn't know about what happened with Rin in the past. After Rin expresses his frustration, Haruka decides to tell him about what happened when they were in grade school.

Haruka and the boys have trained hard to prepare for this showdown against Samezuka. After Day 1 of the tournament, Gou and Amakata-sensei treat the boys to a fabulous, carb-rich feast and allow them to take a breather. Meanwhile, Rin is faced with a tough decision as captain of the Samezuka Swim Club. Who will he choose to swim the relay with him?

Upon Rin’s invitation, Haruka finds himself venturing to “a certain country.” Knowing that Haruka has hit a wall worrying about his future, Rin opens up and speaks to him about his own thoughts and feelings. Afterward, Rin quietly asks Haruka what he will do about his own future...