Season 1

A boy named Aoki disappears from the bathtub. Shiraishi heard that the only thing left behind were algae-like substances and grows fearful, believing that this was the work of a yōkai, especially after what his group of friends did recently.

While looking for food in the garbage, Nezumi-Otoko finds a working laptop with data still stored on it. A few days later, Nezumi-Otoko appears in Yōkai Yokochō with a shiny new car, in addition to expensive and fancy new clothes.