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.
You don't have to get so serious.
Du musst nicht gleich so ernst werden.
No tienes que responderme con tanta seriedad.
No hace falta que respondas tan serio.
Pas la peine d’être si sérieux.
Non c'è bisogno di rispondere
 con quella faccia seria.
Não precisa levar tão a sério.
Не стоит воспринимать всё так серьёзно.