Summer vacation is drawing to an end. When Suguru wins a free trip to Okinawa, all of the five students of Asahigaoka branch school are excited to end their vacation with a bang. Along with Hikage, Konomi, and their teacher and the candy store owner, everyone goes to Okinawa for a fun three-day trip. There, Natsumi makes friends with Aoi, the girl who helps out at the hotel they stay in.