Seven Women who Sneaked in the Night to Get Pregnant / Yobai Suru Shichinin no Harame

The main character of the hentai, Kuga Masaya, has long left home and lives an independent life. Soon he receives a message about his father's death and to find out the details of the tragedy, Kuga comes to the island. As it turned out, his father did not live alone, but with a sister whom Kuga did not know.