[Verse 1: Chaehee, All, Hyunjoo, Haeun]
Code on, is there anyone there?
Yes, sir, the time has come
Shake off your knees and unlock that door
Get sucked into the dazzling sun
(Shh) Can you hear that?
It's dangerous
[Verse 2: Haeun, Hyunjoo]
Breathing gets rough, no exit in sight
With stolen hands and fade out
A nightmare returns
I hope you hold my thorny hand
So I can fall asleep again
[Pre-Chorus: Haeun]
Following this touch etched in my memory
Every night, you come to me in my dreams
Your image etched in my eyes
Torments me in my mind, oh
[Chorus: All]
Blue heart, blue heart (Call me)
Blue heart, blue heart
I'm only you, the one for you
Blue heart, blue heart (Tell me)
Blue heart, blue heart
I'll always protect you
Blue heart
[Interlude: All]
Blue heart
[Verse 3: Jaeeun]
A loud bang, a predictable ending shows where to go
Walking between streetlights, holding my breath
Crushed flower petals appear before my eyes
Even in the empty space, only the red-tinted petals are visible
Time is running out, relying on time, go back, all stop
[Pre-Chorus: Haeun]
Following this touch etched in my memory
Every night, you come to me in my dreams
Your image etched in my eyes
Tempts me in my mind, oh
[Chorus: All]
Blue heart, blue heart (Call me)
Blue heart, blue heart
I'm only you, the one for you
Blue heart, blue heart (Tell me)
Blue heart, blue heart
I'll always protect you
Blue heart
[Bridge: Chaehee, Chaehee & Yeonjeong]
Light up the dark world with brightness
Fear disappears in the hot flames
Now break free
Struggle to the end in the swamp of reality
[Chorus: All]
Blue heart, blue heart (Call me)
Blue heart, blue heart
I'm only you, the one for you
Blue heart, blue heart (Tell me)
Blue heart, blue heart
I'll always protect you
Blue heart
Blue heart, blue heart (Call me)
Blue heart, blue heart
I'm only you, the one for you
Blue heart, blue heart (Tell me)
Blue heart, blue heart
I'll always protect you
Blue heart