It's Summer Vacation.  Yukari spends her time sleeping and having free time until Nyamo arrives and tries to get her to plan some activities.  Some of the girls go to Chiyo's house where she suggests that they go to her summer home for vacation.  They invite Sakaki also along with Yukari and Nyamo for the car ride.  Chiyo-chan and Osaka ride with Yukari which ends up scaring the crap out of them.  Osaka discusses writing kanji with Sakaki and later tries to start telling scary stories.