Airi and Takuo, two college students who met in a club and are dating, are invited by the flashy Shoma and his friends to go on a snowboarding trip. While skiing down a snowy mountain, they are Airi by a fierce snowstorm and are left behind in a mountain hut. The two of them warm each other's cold bodies, and when he tries to kiss them, she refuses, saying "No, I have a boyfriend," but she feels responsible for causing the accident and allows him to have sex. Worried about her boyfriend and unable to sleep at night, she indulges in cheating creampie sex to drown out the cold and anxiety...