Hyojin(You) and BI have been best friends since they were kids. They went to the same school, live in the same neighborhood, and grew up together. They are REALLY close to each other. They were like twins who were so inseperable. They promised to each other, "no goodbyes!", until the day came when BI decided to train at YG to pursue his dreams and Hyojin and her parents decided to migrate in the U.S. 

Hyojin was the first friend that BI had and also the first one who broke his heart.

Now that it's been 3 years since Hyojin left Korea and 1 year since iKON has debuted, Hyojin came back in Korea. 

What will happen if the two meet again?

Will BI confess his feelings for her and vice versa?

or

Will Hyojin find another guy than BI?