During a camping trip, 3 guys: Akira, Naoya, Jun and 4 girls: Seiya, Saki, Sayaka, Yukari decide to take a walk to enjoy nature, then they enter in a forest. Seeing that it\'s becoming late, they try to go back but they got lost on the way, then It started to rain. Seeking shelter, they run toward a huge mansion outside of the forest. When they enter the mansion, nobody home. Akira and the gang tries to find the owner but to their surprise all the doors and windows are closed shut, they are trapped inside the house. Then, a girl appears and tell them that they are in the \"Dark House\" were they show the true nature of girl especially their superficial expression (during h-scene) One by one, the guys and the girls dissapear in every room of the house. What will happen to them ??? Will they come out alive from this mansion ??? Who is this girl and what\'s her connexion with all of them ???