S2E04 Somersault Turn of Promise!

Somersault Turn of Promise! (約束のサマーソルトターン！ Yakusoku no Samaasoruto Taan!) is the fourth episode of Season 2 of the Free! anime and the sixteenth episode of the overall series. It aired on July 23, 2014.

Synopsis
With the prefectural approaching, Gou Matsuoka takes it upon herself to make balanced nutritional bento lunches for the Iwatobi High School Swim Club. When her attempt proves to be effectively inedible, she compensates by putting together a tough training regimen. Meanwhile, Sosuke Yamazaki recalls a promise that he had yet to ask of Rin Matsuoka since he left for Australia. Sosuke asks Rin what happened while he was away and hears about how Haruka Nanase and the others helped him pick himself up. Later that night, Sosuke tells Rin he should give up on relays in order to focus on his Olympic dream, but Rin states his determination to accomplish both. Despite having always preferred swimming individually, Sosuke asks to join the Samezuka Swimming Club's relay team in order to find something that he is missing, then challenges Rin to a butterfly race to earn his spot. Admiring Sosuke's passion, Rin changes the way swimmers are selected for relays, asking for only those who are serious about being in a relay team to step forward.

Characters
List of characters in order of appearance:

Trivia

 * Prior to Eternal Summer's English DVD release by Funimation the episode was called 'The Somersault Turn of Promise!' in English