College couple Airi and Takuo join a snowboarding trip after being invited by flirtatious Shoma and his friends. A fierce blizzard separates the group, leaving Airi and Shoma stranded together in a mountain cabin. They press their freezing bodies together for warmth. When he asks for a kiss, she refuses because she has a boyfriend, but guilt over causing their predicament eventually makes her consent to sex. Unable to sleep while worrying about Takuo, Airi spends 13 hours drowning her cold and fear in cheating sex as Shoma creampies her again and again.