Miyu joins her boyfriend and his friends on a snowboarding trip, but a raging blizzard leaves her trapped in a mountain cabin with one of his friends. With their clothes soaked and their bodies freezing, they strip naked and hold each other for warmth. She refuses when he tries to kiss her, but guilt over being the reason they became stranded eventually makes her give in to sex. His bare cock slides inside her, and despite her guilt, her body responds. Every time he gets hard again, he takes her once more and fucks her through orgasm after orgasm. She keeps insisting that it must remain their secret, even as she opens up to him more each time. Unable to sleep while worrying about her boyfriend, she spends the night burying her cold and fear in repeated cheating sex as his friend cums inside her again and again.