Taichi and Mizuki are two childhood friends who have feelings for each other. - They enjoyed a short trekking trip together and held hands for the first time. - They kissed for the first time, confirmed their feelings for each other, and decided to start dating. - However, due to his excitement, he gets lost on the mountain path and ends up at a certain mountain hut. - There, there are monster-like men named Kita, the owner of the mountain villa, and his friend Kudo, who are cleaning up the mountain villa in order to shut down the business and close the mountain villa due to lack of customers...