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.
Why did he suddenly decide 
to swim the relay?
Warum hat er sich plötzlich entschieden, die Staffel zu schwimmen?
¿Por qué dijo repentinamente que 
va a participar en el relevo?
¿Por qué sale ahora con que 
quiere participar en el relevo?
Pourquoi veut-il soudain 
faire le relais ?
Perché ha improvvisamente
 deciso di partecipare alla staffetta?
Por que ele decidiu participar do
 revezamento assim, do nada?
Почему он вдруг решил
участвовать в эстафете?