Yoo Jung, because of her hot constitution, tends to overheat during sexual intimacy and is never able to have a truly satisfying experience. Eventually, this leads to her breaking up with her boyfriend. Then one day, at a high school reunion, she reunites with Hanseo, a longtime childhood friend. Hanseo, unlike Yoo jung, has a cold constitution. The two feel a subtle tension sparked by a small touch, and like that, they end up spending the night together….
