Nami and Taichi are juniors and seniors at university. - While the two of them were climbing a mountain, they confirmed their feelings for each other and decided to start dating. - Perhaps because I was so excited, I got lost on the way down the mountain and ended up at a mountain hut. - The two of them were allowed to stay at a mountain lodge before sunset, but... - The managers of the mountain villa are beast-like men, and as expected, they end up toying with Nami right in front of Taichi. - Taichi, who had only kissed him so far, was in despair. - On the other hand, Nami reveals her masochistic tendencies and begins to feel it while being laid down...