There's trouble at the beach.  The four swim club members are forced to revisit their motivation to swim.  After Rei asks Makoto about his odd behavior during the training camp, Makoto tells them about his past.
That's the Summer Triangle.
Das ist das Sommerdreieck.
Ese es el triángulo de verano, ¿cierto?
Ahí está el triángulo del verano, ¿verdad?
C’est le triangle d’été.
Quello è il Triangolo Estivo.
Aquele é o Triângulo Veranil.
Это Летний треугольник.