Yoo Jaein knew Kim Seungmin as her favorite singer long before she knew him as a person. Somewhere between recording sessions and one more take, admiration became something she could no longer hide.

The public ships them. The members ship them. Their coworkers ship them. Half of Korea ships them. Jung Ara and Hwang Hyunjin would like everyone to know that they are absolutely not dating.

Yoon Sohee worked too hard for her promotion to let one idol ruin it. Lee Know worked too hard on his performances to let one creative director change them. Unfortunately for both of them, they're now stuck working together. Between comeback stages, music videos, award shows and increasingly personal arguments, professional disagreements slowly become something much harder to ignore. And neither of them is happy about it.

Kim Naru joined JYP Entertainment to work in marketing, not to be noticed by Bang Chan. But when a late-night studio session leads to him hearing the music she keeps hidden from everyone else, the lines between work, passion, and something far more dangerous begin to blur. Some connections happen by accident. Others are written in melodies.