You are Shinichi Kashiwagi, a college student. Out camping one night, a typhoon hits and you find yourself cold and lost in the middle of the woods. Struggling against the roaring winds and pouring rain, you stumble downhill and injure yourself. When you wake up, you are in bed with a beautiful woman. She's trying to warm up your cold body through some very erotic means. Later on, you discover that you are trapped in a large antique mansion full of gorgeous ladies. The problem is, you can't get out. They can't get out either. But the mistress of the mansion senses the power of change within you... and if you help the ladies resolve their inner conflicts, you might just be able to return to your world with the girl of your choice.