F158-JF-79 The rituals of imprisonment and sacrifice

Shinano Makoto and four other female college students go on a road trip. But they get lost along the way and end up arriving at a quiet village deep in the mountains. They are welcomed by the villagers, and decide to stay there for the night. Their bodies are extremely attractive… But the next morning, none of the five of them are found. Even Sayuri, who went to look for Akemi, disappeared as well… Imprisonment, torture, and other horrible things happen to them one after another. What is their true identity?