Eri Dong (You), little sister to the famous Taeyang, is a up rising star. Keeping the promise she had with your childhood friend Taemin, one of the group members of the famous k-pop band SHINee, who also know about her. As she rises to star dome she once again meet up with SHINee 2 years later and find out they all have developed feelings for her. Who will she chose and what is the promise that needs to be kept?