You are a student who ends up stranded on a desert island on a plane trip.

After a few hours of arriving on the island you find a spring, collecting plastic bottles you store some water while you explore the island.

As you explore the island you hear voices and go to the source, what you find are four girls who seem to be from the same educational institution as you.

Homare Onishima she is a survival expert.

Shion Kujo is a very cute and spoiled rich girl

Asuka Suzumori is a sporty and cheerful girl

Mutsu Amatani is a girl who is a bit introverted and nerdy.