Comical adventure story starring Kasukabe Defense Forces and dealing with 'food' as theme. Kasukabe Defense Forces (Shinnosuke and his mates: Kazama-kun, Nene-chan, Masao-kun and Bo-chan) decide to attend 'B-class Gourmet Carnival', a big event in Kasukabe, without their parents, to eat very tasty yakisoba sauce cooked by 'Sauce's Ken'. On the way, a mystery woman asks them to bring a legendary sauce to Sauce's Ken. They head to the event site with the sauce, but they wander off into a mountain, and 'A-class Gourmet Organization', an organization plotting to eliminate B-class gourmet, seeks to take the sauce away from them.
