Yujeong has a naturally hot body temperature, and she tends to overheat during sex, so she’s never really able to fully enjoy it—and she even ends up breaking up with her boyfriend because of it.

Then one day, at her high school reunion, she runs into Hanseo, her longtime childhood friend. Unlike Yujeong, Hanseo has a naturally cold body temperature.

Even a little bit of skinship between them sparks a quiet tension, and before they know it… they end up spending the night together.