Namjoon and Eunmin were friends since kindergarten. However when they entered college their friends dared them to be together for one week, but Namjoon started to grow feelings for Eunmin.
Chung Eunwoo was your everyday average high school girl except for the fact that Kim Seokjin from BTS was her best friend since middle school. Then of course like any other problems she grows feelings for him. Tune in to My Best Friend is an Idol.