[Intro: Hanni]
This song it's about you, baby
Only you
You, you, you
You, you, you, you

[Verse 1: Haerin, Minji, Danielle]
When I'm down, feel like I'm crying (Mm-hm)
When I can't even pretend to be okay (Mm-hm)
It's you, you worry about me
It's you, you make me laugh
No need to say, boy, what do you say?

[Pre-Chorus: Hyein, Danielle, Minji, Haerin]
(They keep on asking me, "Who is he?")
You're only one call away
(They keep on asking me, "Who is he?")
You show up with no hesitation
(They keep on asking me, "Who is he?")
Can this be real?
(They keep on asking me, "Who is he?")
You really are, he's the one that's living in my system, baby

[Chorus: Hanni, Danielle]
Oh my, oh my God, I knew this would happen
I was really hoping that he will come through
Oh my, oh my God, it's only you
Asking all the time about what I should do

[Post-Chorus: Haerin, Hyein, Hanni]
No I can never let him go (Ooh)
I only think of you, twenty-four (Ooh)
I'm a lucky girl (Ooh)
I know, I know (Ooh)
Before I met you (Ooh)
Everything was pointless (Ooh)
My feeling is boundless (Ooh)
I know, I know, I'm going crazy right?

[Verse 2: Minji, Danielle, Hanni]
Wherever, whenever
There ain't nothing else that I would hold on to
I hear his voice through all the noise
Don't let go of my hand for one second no, no
Got no worries 'cause I got someone
It's okay to be alone 'cause I love someone

[Pre-Chorus: Hyein, Hanni, Danielle, Minji]
(They keep on asking me, "Who is he?")
You're only one call away
(They keep on asking me, "Who is he?")
You show up with no hesitation
(They keep on asking me, "Who is he?")
Can this be real?
(They keep on asking me, "Who is he?")
You really are, he's the one that's living in my system, baby

[Chorus: Hanni, Danielle]
Oh my, oh my God, I knew this would happen
I was really hoping that he will come through
Oh my, oh my God, it's only you
Asking all the time about what I should do

[Post-Chorus: Haerin, Hyein]
No I can never let him go (Ooh)
I only think of you, twenty-four (Ooh)
I'm a lucky girl (Ooh)
I know, I know (Ooh)
Before I met you (Ooh)
Everything was pointless (Ooh)
My feeling is boundless (Ooh)
I know, I know (He's the one that's living in my system, baby, baby)

[Interlude: Haerin, Hanni, All]
Baby
Babe, baby
I'm going crazy, right? (Baby)
Baby
I'm going crazy, right?
Babe, baby
You and me

[Bridge: Hanni, Hyein, Danielle]
My heart is glowing, it's glowing up (Glow, glow)
With you, nothing can scare me (No, no)
All filled up, all filled up (All red now)
My heart is glowing, it'd be glowing
'Cause he

[Chorus: Hanni, Danielle]
Oh my, oh my God, I knew this would happen
I was really hoping that he will come through
Oh my, oh my God, it's only you
Asking all the time about what I should do

[Post-Chorus: Minji, Hyein, Haerin]
No, I can never let him go (Ooh)
He's right there for me, twenty-four (Ooh)
I really am a lucky girl (Ooh)
I know, I know (You and me)
Before I met you (Ooh)
Everything was pointless (Ooh)
What should I do?
My heart is glowing, it's glowing
My heart is glowing, so I can't sleep at night