淫祭の島～血と白濁の贄～

One day, Shinji and his friends visit a deserted island. However, a big earthquake suddenly strikes and the island is completely changed. Yes, there are people living on the island. They try to get out of the island, but their ship is gone somewhere. It gets dark and they decide to stay at a house nearby. At dawn, they hear someone playing the musical instrument. To check it, they leave the house, without knowing it is just the beginning of tragedy...