Junhwe feeds lies to his grandparents about dating Nayeon to keep them off his case, and Nayeon isn't pleased when he comes up with the brilliant idea to have her pretend to be his girlfriend for the two days of his grandparents' stay.

Jongin and Soojung have been best friends since kindergarten. However, things change when in the final year of elementary school, Soojung has to move away to the States. During that time, Jongin grows out of his "nice guy" personality and turns into a troublemaker who captures the hearts of everyone in school, changing his alias to Kai. But when a girl named Krystal transfers from