Park Kyesin loves Kevin, Kevin likes someone else, and Kiseop loves Kyesin. When Kyesin finds out that Kevin already has a girlfriend, things go downhill, and she falls into deep despair. Kiseop then does his best to cheer her up, even if it meant them ending up being together. But what if something bad happens and gets in between their love? Is it forbidden? Or is it all just a lie?