Histoire
When an unplanned stop on a deserted island gives Takashi, Saeko and the rest of the ragged band of survivors a chance to expose themselves to something other than zombie bites for a change, they're more than ready to take a break and let their hair down. Discovering the remnants of an old beach store, the entire group strips to swimsuits and sets out to make the uninhabited island inhabitable, but they're unaware that this seeming paradise is actually just the dead calm before the storm.
Synopsis via AniList (en anglais).