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...
From the river, huh?
من النهر؟
Aus dem Fluss, was?
-¿Del río?
-Eso es obvio.
-¿Del río?
-Eso era evidente.
Du fleuve, c’est ça ?
Dal fiume, eh?
Do rio, é?
Из реки?