[Verse 1: Jooyeon, Jungsu, Gaon]
Getting more and more used to the unfamiliar
The me reflected in the mirror, oh-oh
It is surely yesterday's rebellious me
It felt solid
Suddenly (Doubt grows)
All night (My worries grow)
Invisible
The starting point
[Pre-Chorus: O.DE, Jungsu]
Crack, crash in my head
Crump, crush
Split in two and split again
Dive sharp
Gradually unfolded
Between the cracks
I can see a different me
[Chorus: Jooyeon, Jungsu]
Crack in the mirror
In my heart
A thin crack formed
Even I am
Confused
I don't know who I am
[Verse 2: Gaon, O.DE]
I guess I've lost myself (I guess I've lost myself)
Even if I cover the gap with both hands (even if I cover the gap with both hands)
It goes bad
A gradual sign of collapse
Just tryin' to go back to what I was though
The more you look at me
Face up
The crack is getting wider
[Pre-Chorus: Jooyeon, Gaon]
Crack, crash in my head
Crump, crush
Split in two and split again
Dive sharp
Gradually unfolded
Between the crack
I see a different me
[Chorus: Jooyeon, Jungsu]
Crack in the mirror
In my heart
A thin crack formed
Even I am
Confused
I don't know who I am
[Bridge: Gunil, Jooyeon]
Can be a hero to someone
Perhaps to anyone
[Chorus: Jungsu, Jooyeon]
Crack in the mirror
In my heart
A thin crack formed
Even I am
Confused
I don't know who I am
[Outro: Jungsu, Gaon]
Na-na-na, na-na-na-na
Who is that person in the mirror
A crack in the mirror