The Iwatobi Swim Club needs one more member before it can participate in relays.  Nagisa has set his sights on his classmate Rei, who is a member of the track team.  Despite Rei's refusal to join, but Nagisa appears intent on recruiting Rei into the swim club.
but you're not going to 
improve at this rate.
aber so wirst du dich 
nicht verbessern.
así no vas a mejorar en nada.
pero así no mejorarás.
mais tu ne progresseras pas 
comme ça.
ma di questo passo 
non otterrai miglioramenti.
mas você não vai se
 aperfeiçoar nesse ritmo.
но в таком случае ты
не усовершенствуешься.