The little buses and Hana are invited to the countryside by Nana. There they meet new friends Ractor, Champ, and Coco. Everyone is having a good time except Nana's childhood friend Coco who's upset that Nana seems to be praising Tayo all the time. Tayo and the other buses agree to help Ractor with a few things, but when Tayo repeatedly makes mistakes, Coco jumps at the opportunity to criticize him.