Her boyfriend visits her home with a friend. It's winter, and they are in the living room with a kotatsu. For various reasons, they end up drinking together. Eventually, the boyfriend falls asleep, not sure if he collapsed or passed out. Driven by the alcohol and the eros in the kotatsu, the boyfriend's friend's imagination runs wild with desire. In the tense situation where the boyfriend is sleeping next to the woman he shouldn't touch, he plays a mischievous trick.
