Kazuma Shiraishi, whose ship sank due to a storm during a school trip, drifted to an uninhabited island.
Kazuma meets his childhood friend Kotoko, who also drifted to the island, and meets beautiful girls named Saori, Espresso, and Moe, who are classmates on the same ship.
One day, Kazuma finds a video camera that has drifted to the beach …
