Two female college students, Urara and Mari, come on a graduation trip to a hot spring resort in the mountains, surrounded by nature. However, this trip was a crazy graduation trip, meticulously prepared by their jealous best friend Mari and her accomplices, and was full of love and hate. In this remote area, cut off from the outside world and with no way to escape... Urara is violated by men hungry for women. Urara falls into her best friend's trap, and is forced to engage in all sorts of perverted play, such as exhibitionism, restraints, bondage, peeing, gangbang, and bukkake. Before she knows it, Urara has become a sex slave, surrendering herself to pleasure alone...