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...
What's that?
ما تلك؟
Was ist das da?
¿Qué es eso? ¿Una bellota?
¿Qué es eso? ¿Una bellota?
C’est quoi ?
Un symbole de bol à couvercle ?
E quello cos'è?
O que é isso?
Что это?