Mana and Neko-Musume visit a tourist resort island. At the same time, Nezumi-Otoko came to the island with a talent and TV crew to produce a program about bizarre and scary stories. On this island, there was a legend about a terrifying yōkai called Gyūki. The talent doesn't believe the legend at all and moves the Gyūki Rock, which breaks the seal. The talent suddenly started suffering and transformed into the Gyūki. The Gyūki ate Nezumi-Otoko and went on a rampage, destroying everything in its path. Just when things began to look grim for Neko-Musume and the others, Kitarō appears and defeats the Gyūki. Although it seemed that the Gyūki was perfectly vanquished, Kitarō...!?