I missed read the title as "Miko just got her driver's license" & immediately felt concern about other people's safety on the road. Glad to see that its actually Mio who is driving.
@@KonekoArvithey did fall asleep during the drive. Most people only sleep during drives longer than 30 minutes on the road. On cities, there's usually to many distractions and stop&go due to traffic for people to fall asleep.
Their trip would be spent mostly on road if that is the case but they flew from Tokyo to Okinawa then rent a car there. They can use taxi but they can talk more freely in rental car.