Melody Day started their career as a trio in 2012, featuring on soundtracks for dramas such as Bridal Mask, Cheongdam-dong Alice, Missing You, My Daughter Seo-young, The King of Dramas, I Can Hear Your Voice, Master's Sun and Pretty Man.
Melody Day memulai karier mereka sebagai trio pada tahun 2012, tampil dalam soundtrack untuk drama seperti Bridal Mask, Cheongdam-dong Alice, Missing You, My Daughter Seo-young, The King of Dramas, I Can Hear Your Voice, Master's Sun dan Pretty Man.