Kotoha discovers a powerful new weapon hidden in a box of toys. Later, when Sat-chan learns about a decades-old scandal involving the elephants at Ueno Zoo, the colors investigate and find themselves fighting a man-eating tiger.

Yui and Kotoha have an awkward conversation while waiting for Sat-chan to arrive, after which the girls go around collecting trash. Later, the girls investigate a peculiar smell and wind up collecting stinky gingko nuts. With the arrival of Halloween, the Colors decide to play a Zombie Game in which Yui must prevent Kotoha and Sat-chan from filling the park with zombies.

The Colors have a training day with an intense game of hide-and-seek! Sat-chan, as usual, takes it up a notch...