Keroro hatches a new scheme for the Christmas season, but Dororo and Tamama refuse to go with it for different reasons. Tamama tells Keroro about Santa Claus, who knows when you've been naughty or nice, prompting Keroro to carry out investigations on Santa Claus. Unfortunately the Christmas season of cheer and good will begin to take effect, as Keroro's remaining loyalists Giroro and Kururu desert him as well. Left to his own devices, Keroro begins to discover the Christmas spirit in a way he hadn't really expected.
Keroro is unusually hot-blooded about spring-cleaning time, taking charge of housecleaning operations in the Hinata household, and imparting valuable tips and tricks to the Hinata family. At the end of the day, human and Keronian alike sit down for noodles, listen to the bells, and welcome the new year.
