Kouto Hikari and Sumire Kurokawa, office ladies working at a real estate company in Tokyo, had come to the mountains for a reconnaissance of a company event's trekking route. However, they got lost on unfamiliar mountain paths. After wandering in the mountains for more than a day…they finally reached a mountain lodge. It was a lodge on the brink of closure, and its owner, Kitahara Kita, was in the process of tidying up. Despite their pleas to stay just for one night, Kita ignored them. Then, Kita's accomplice, Kudou, appeared and set his eyes on the exhausted bodies of the two women…
