A shy girl named Natsu Iwashimizu awakes during a storm and is taken aboard an inflatable boat with three others. No-one recalls what happened, and they paddle their way to a nearby rocky island. The others introduce themselves as Arashi Aota, Semimaru Asai and the older Botan Saotome. The group then look for water and food. Meanwhile, another group have also landed on an island; Hana Sugurono, Mansaku Tsunomata, Fujiko Amacha, Haru Yukima, Momotaro Nobi, Chisa Taiami, Hibari Nigusa and their leader, the arrogant and belligerent Dosei Yanagi...