The hot, hot summer of Tajimi has arrived, and Himeno, Mika, Naoko, and Touko have a blast in the river trying to catch eel!
Then suddenly a kappa appears before them and takes them down to Ryūgū-jō.
Inside Ryūgū-jō, a certain person in the form of their high school self is awaiting them...
Eels, huh? Speaking of eels, Kawase-san 
with the eel business has a daughter,
الأنقليس؟ بذكر الأنقليس، لكاواسي-سان
صاحبة محلّ الأنقليس ابنة
Aale …
Le anguille, eh?
Enguias, é? Ah, falando em enguias, sabe a
Kawase-san, que tem um negócio de enguias?
Угрей? Кстати, у Кавасэ,
который ими торгует, есть дочь,