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...
Surprised you, huh?
فاجأتك، صحيح؟
Siete sorprese, vero?
Peguei vocês, hein?
Удивлены?