The summer heat is on!
Koizumi-san looks at the trio loudly suffering from the heat with disdain while she continues on her ramen pilgrimage. 
Yuu wills herself to follow her, and Koizumi-san declares that she will be having "hiyashi" ramen.
What exactly is this "hiyashi" ramen?
It is strictly a seasonal summer pleasure.
.إنّها لذّة موسميّة صيفيّة بشكل دقيق
Sie gelten besonders
als Freude des Sommers.
Es solo un placer de verano.
Es solo un placer de verano.
C’est le petit plaisir de l’été.
È un vero e proprio piacere estivo.
É um prazer exclusivo do verão.
Это исключительно летнее удовольствие.