By chance, Tayo saves Nana who was in trouble. Nana lives in the country and she's visiting the city. So when Tayo shows her around the city in a very skillful manner, Nana thinks that Tayo is the boss of the buses. Tayo feels good upon hearing someone call him, "boss," so he doesn't deny it, and then parts ways with Nana.
But after Tayo gets back to the garage from his route, he sees Nana with the other little buses. Afraid that the others will know he had boasted to Nana, he quickly takes her out of the garage. Nana says that she wants to go to City Tower, a place she's never been before. Tayo heads toward City Tower, not knowing what to do, because he doesn't want Nana to find out that he had lied about being the boss.