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...
That costume in the middle 
of a Tajimi summer?!
!ترتدين زيّاً تنكّرياً في منتصف صيف تاجيمي؟
Was trägst du mitten in Tajimis Sommer
ein Ganzkörperkostüm?!
T’es folle,
de porter ça en plein été !
Come ti salta in mente di indossare
un costume nel bel mezzo dell'estate di Tajimi?!
Que doideira usar essa roupa
no verão de Tajimi!
Зачем тебе этот
костюм в разгар лета?!