Krystal and Kai are couple. They are neighbour and not attend the same school. They had a secret plan that their partner didn't know about it. Krystal want to cheat behind Kai's back while Kai want to cheat behind her back. Both of them really didn't know about it. Because of their plan, one relationship disaster!! One love separated! One love vanished! Sehun and Jiyeon broke up because of their love game. Krystal likes Sehun and tried to make him as her scandal while Kai likes Jiyeon and tried to make her as his scandal.

Jiyeon and Sehun broke up when they want to be with the person that they like. Sehun with Krystal while Jiyeon with Kai. What if they know about the two cheaters status? What will happen to Kai and Krystal relationship if the both of them know about their love game? How about Sehun and Jiyeon? Will they be back together?