It's summer vacation! Futaro (VA: Yoshitsugu Matsuoka) and his younger sister Raiha (VA: Natsumi Takamori) 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?The five heroines are fully voiced by popular Japanese voice actors: Ichika Nakano (VA: Kana Hanazawa), Nino Nakano (VA: Ayana Taketatsu), Miku Nakano (VA: Miku Itou), Yotsuba Nakano (VA: Ayane Sakura)...