The worst track in this mini album is definitely “Missing” too much of auto-tune used in this song, which is not natural. And the music is kind of cheap too...nothing really going on. It's like the second part of song “Life” from the previous singles “Mirrocle World”. Too boring!

I don't know why the fans tend to like this song mostly than other tracks. They must have a bad taste in choosing the right music or song to their most favorite list