the song is not released yet, not digitally released! The reason why it is here because heejin appeared as a guest to haseul's mini theatre concert in 26th of Oct, she chose this song because this song she doesn't write the lyrics!
@@hanguyenhoang902 ah I see. Thanks. I had no idea she performed the song before the highlight medley was even released. I only just found out about this appearance today because this video popped up.