The princess of a neighbouring country visits Tayo's city, and upon seeing her, Lani desires to become a princess as well. Realizing that she can never become a princess, Lani starts to become ill. To cheer Lani up, Hana suggests that the little buses treat Lani like a princess for one day.
The little buses start to treat her like a princess, being at her beck and call. But since the little buses are unaccustomed to Lani acting like a princess, they eventually get angry with her. Disappointed with the little buses, Lani runs away from the garage.