I oktober introducerede Melody Day et nyt medlem, Yoomin. <ref name=new>{{cite news|url=http://news.naver.com/main/read.nhn?mode=LSD&mid=sec&sid1=106&oid=108&aid=0002345543|script-title=ko:멜로디데이, 새 멤버 '유민' 영입..지아 신곡뮤비 출연|trans-title=Melody Day, new member 'Yoo-min' recruited... starred in Zia's new song MV|date=6. oktober 2014|access-date=9. oktober 2014|language=ko}}</ref> Gruppen udgav deres første sang som en [[kvartet]], "Listen to My Heart", til dramaet ''[[Naeils Cantabile]]''. <ref>{{cite news|url=https://sg.entertainment.yahoo.com/news/video-melody-day-unveils-listen-to-my-heart-052518982.html|title=Melody Day Unveils ‘Listen to My Heart’ MV for ‘Naeil’s Cantabile’|date=4. november 2014|access-date=4. november 2014}}</ref> Den 12. december udgav Melody Day deres første digitale single "Anxious" med deltagelse af [[Mad Clown]]. <ref>{{cite news|url=http://www.soompi.com/2014/12/11/melody-day-releases-anxious-mv-feat-mad-clown/|title=Melody Day Releases "Anxious" MV Feat. Mad Clown |date=11. december 2014|access-date=12. december 2014}}</ref>
Musik