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...
I had no idea the Toki river 
was this wide and this deep.
لم أعلم أنّ نهر توكي واسع وبهذا العمق
Wusste gar nicht, dass der
Toki-Fluss so tief und weitläufig ist.
No recordaba que el río Toki
fuera tan grande y profundo.
No recordaba que el río Toki
fuera tan grande y profundo.
Le fleuve Toki
est aussi large et profond ?
Non immaginavo che il fiume Toki
fosse così ampio e profondo.
Não sabia que o rio Toki
era tão grande e profundo.
Не знала, что река
Токи такая большая и глубокая.