Airi and Takuo, college students who are acquaintances in a club and are dating, are invited by Shoma and others to participate in a snowboarding trip.While gliding down the snowy mountains, Airi and Shoma are left behind in a mountain hut after being attacked by a blizzard.The two of them, who warm each other's cold bodies together, are forced to kiss and refuse, saying, "No, I have a boyfriend."At night when she couldn't sleep because she was worried about her boyfriend, she was drowning in cheating sex to drown out the cold and anxiety.