Kanojo x Kanojo x Kanojo: Sanshimai to no Dokidoki Kyoudou Seikatsu

Haruomi lives peacefully on a small island. But one day, a volcano erupts, so he gets out of the island and temporarily stays at his relative's house. He meets Natsumi, Akina, and Mafuyu there. They are sisters and all pretty. His peaceful life suddenly turns into an exciting erotic life....
(Source: ErogeShop)