"We're both idols yet you look like a doll come to life and I, the child that desperately wants you." Lee Yuri has been composing B-side tracks for hit boy group BTS in secret for years after being pushed out of Big Hit in the past. Ex-trainee, now Composer of a small entertainment company, Yuri finally debuted in a girl group. While promoting for her first solo album and missing the warmth of her girl group members, Yuri might finally win an award at the year-end ceremonies. But one fateful encounter with Seventeen leader S.Coups changes everything. The stage is broken, the awards get cancelled, the crowd is screaming but all Yuri sees are the beautiful eyes of Choi Seungcheol-What happened?!