Kukuri of the Strange River
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...
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