Haruka and the other club members decide to hold a training camp to prepare for prefectural.  Each member follows his own regimen.  However, Rei is unhappy about falling behind and heads back into the ocean at night to practice.
Summer Training Camp from 
Hell on a Deserted Island...
Sommertrainingslager aus der Hölle
auf einer verlassenen Insel...
du club de natation d’Iwatobi 
sur une île déserte…
Training Camp infernale 
su un'isola deserta...
Clube de Natação da Iwatobi.
адский летний лагерь
на необитаемом острове...