Based on the manga with the same name, it follows a new storyline that sees Futaro trapped with the girls on a tropical island as a brief summer getaway is stretched out over weeks. There, Futaro will interact with the sisters, Ichika, Nino, Miku, Yotsuba, and Itsuki, as well as Futaro's younger sister, Raiha. Players can unlock new artwork, costumes, and up to 14 endings. The gameplay promises a "heart-pounding desert island life" and a "five-girl tutoring adventure experience."

It's summer vacation! Futaro and his younger sister Raiha have been invited to the quintuplets' private island.

But a sudden storm turns what was supposed to be a three-day, two-night vacation into two weeks of survival!

What fate awaits in this edge-of-your-seat island adventure with the quintuplets?