The Somersault Turn of Promise!.Gou decides to make nutritional bento lunches for the team. When her attempts prove inedible, she compensates by putting together a tougher training regimen. Sousuke tells Rin he should give up relays in order to focus on his Olympic goal, but Rin says he can accomplish both. Despite preferring to swim individually, Sousuke asks to join Samezuka's relay team in order to find something he's missing, challenging Rin to a butterfly race to earn his spot. Admiring Sousuke's passion, Rin changes the way swimmers are selected for relays, asking only those who are serious about being in a relay team to join.