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?
Please, think nothing of it.
.كلاّ، لا شكر على واجب
Aber nicht doch,
kaum der Rede wert.
No es nada.
No es nada.
Mais non, ce n’est rien.
Di nulla, davvero.
Oh, não foi nada.
Не стоит благодарности.