Despite being college students, Fumiya and Saho spend their days lazily lounging around. As the cold weather keeps them cooped up indoors, they suddenly realize they've already entered their fifth round. With both stamina and energy nearing their limits, Fumiya heads out to the convenience store when hunger strikes. But the moment he returns home, the chill of the outside air feels strangely invigorating—prompting him to shockingly suggest going for a sixth round. Here unfolds the erotic twist hidden within their everyday lives.