[Intro: Bien, Slyleaf, Bien & Slyleaf]
Hey!
Ha ha ha ha ha ha
No...
Alright Alright, Yeah yeah
Ho hooo
Alright, 1, 2, 5, uh

[Verse 1: Slyleaf, Bien, Slyleaf & Bien]
요즘 나 조금 패닉 상황 (ha!)
솔직히 완전 홀릭인데 (hey!)
머릿속 어떤 녀석 그 생각 하나뿐이야
One, one, one, one
One one one one one one one one

[Pre-Chorus: Slyleaf, Bien]
Ah ah ah (alright, hey!)
친구들 say 걔는 안돼 너무 나빠 네가 다쳐
Ah ah ah (ooh) (yeah, yeah, yeah)
누가 말려 내가 좋으면 가는 거죠

[Chorus: Slyleaf, Slyleaf & Bien]
Ay, oh my God! (He’s a really bad boy)
He’s a really bad boy
He’s a really bad boy
Ay, oh my God!
He’s a really bad boy
He’s a really, really, really, really, really bad boy
Hey, yeah, yeah, yeah!

[Post-Chorus: Slyleaf]
You’re so bad, boy (Ah, ah, ah)
You’re so bad, boy (Ah, ah, ah...)
You’re so bad, bad, bad, bad (Hey yeah, yeah!)
Bad bad, bad bad boy (Hey yeah, yeah!)

[Verse 2: Slyleaf with Bien, Bien]
Bang bang pow, he’s a really bad boy
How he plays with hearts instead of playing with his toys
And I don't really care 'cause I'm really in love (boy)
Mine, mine, mine, mine

[Pre-Chorus: Bien, Slyleaf]
Ah ah ah (alright, hey!)
멋대로 해 허락할게 있는 힘껏 나빠져 봐
Ah ah ah (No~)
그런 네가 변해갈 때 짜릿하지
Oh my God!

[Chorus: Slyleaf, Bien,Slyleaf & Bien]
Ay, oh my God! (Oh my God, oh my God)
He’s a really bad boy
He’s a really bad boy (Oh my God)
Ay, oh my God!
He’s a really bad boy
He’s a really, really, really, really, really bad boy (Ohhh)

[Post-Chorus: Slyleaf with Bien]
Ah, ah, ah, ah, ah!
(You’re so bad, boy) (Hey yeah-yeah, yeah-yeah, yeah-yeah)
Ah, ah, ah, ah, ah!
(You’re so bad, boy) (Hey yeah-yeah, yeah-yeah, yeah-yeah)
You’re so bad, bad, bad, bad (Hey yeah, yeah!)
Bad bad, bad bad boy (Hey yeah, yeah!)

[Bridge: Bien, Slyleaf, Bien & Slyleaf]
And I know that I need someone to
Look after me and all I do
But no one else makes me smile the way you do
You’re a bad boy and you’re bad for me
You’re a bad boy and you’re bad for me
You’re a bad boy and you’re bad for me
And I know that I need someone to
Look after me and all I do
But no one (You’re a bad boy and you’re bad for me)
Else makes me smile (You’re a bad boy and you’re bad for me)
The way you do, (You’re a bad boy and you’re bad for me)
Whoa whoa
You’re a bad boy and you’re bad for me!

[Chorus Reprise: Slyleaf & Bien, Slyleaf]
Oh my God, he’s a really bad boy
He’s a really really really really really bad boy
Oh my God, he’s a really bad boy (Ah, ah, ah)
He’s a really bad boy (Ah, ah, ah)
(He’s a really bad boy, uh!)
Oh my God, he’s a really bad boy (yeah-yeah, yeah-yeah, yeah-yeah, yeah!)
He’s a really bad boy (yeah-yeah, yeah-yeah, yeah-yeah, yeah!)
(He’s a really bad boy, uh)

[Outro: Slyleaf]
Oh my God!
(He’s a really bad boy, he’s a really bad boy, he’s a really bad boy)
He’s a really bad boy!
He’s a really bad boy!