This is the chord progression of Bad Boy by Red Velvet on Piano, Guitar, Ukulele and Keyboard.

[Verse 1]
Em
Who dat who dat who dat boy
A
sumaneun saram sok nune ttin
D
mushimhan geu pyojeong I like that
D#m
nae hogishimeul jageukaji

[Verse 2]
Em
Oh shikeuhan seutaireun deom
A
ibeun oseun shingyeong sseun deut an sseun deut
D
gwanshim eomneun maltu I like that
D#m
wemyeonhae bwado kkeullyeo

[Pre-Chorus]
Em A
dalla dodohan nal utge hajana
D
aljana yojeum naega Hot ah ah
(D#m)
nal boneun shiseon neodo neukkyeobwa

[Chorus 1]
Em
hollin deut nal ttarawa
A7 D
modu hwanhohae neodo got Ooh ooh (Oh-eh-oh-eh-oh)
D
anin cheokaedo neon Ooh ooh (Oh-eh-oh-eh-oh)
D#m
han beon naegireul haebolkka

[Chorus 2]
Em
neomu shwipgen oji ma
A7 D
jaemieopjana geogiseo Ooh ooh (Oh-eh-oh-eh-oh)
D
milgo danggyeobolkka Ooh ooh (Oh-eh-oh-eh-oh)
D#m
shijakalkke Bad boy down

[Interlude]
Em A
Whoa~ whoa~
D
jigeumbuteo Bad boy down
N.C.
Whoa~ whoa~

[Verse 3]
Em
jamkkan iri wabwa neoegeman hal mari isseo
A
gakkai jom wa gogael sugyeo kireul natchweobwa
D
Uh dareun geon shingyeong sseuji ma
N.C.
nae moksorie jipjunghae

[Verse 4]
Em
sanghwangeun jom dallajeo
A
juwireul maemdoneun naega gunggeumhae
D
neodo alge dwel kkeoya (mweolkka?) al kkeoya (malhae)
D#m
imi neujeobeoryeottan geol

[Pre-Chorus]
Em A
maja sashil kkwaena jashin isseo nan
D
jineun geim hajin ana Ha ah ah
(D#m)
beolsseo banjjeumeun neomeowatjana

[Chorus 1]
Em
hollin deut nal ttarawa
A7 D
modu hwanhohae neodo got Ooh ooh (Oh-eh-oh-eh-oh)
D
anin cheokaedo neon Ooh ooh (Oh-eh-oh-eh-oh)
D#m
han beon naegireul haebolkka

[Chorus 2]
Em
neomu shwipgen oji ma
A7 D
jaemieopjana geogiseo Ooh ooh (Oh-eh-oh-eh-oh)
D
milgo danggyeobolkka Ooh ooh (Oh-eh-oh-eh-oh)
G
shijakalkke Bad boy down

[Bridge]
G Em Bm
hollanseureon mamigetji sangsangjocha motal kkeoya
F#m G
heeonaryeo noryeokaedo eotteon jageun teumdo eopseo
A D
jeongdabeun jeonghaejeo isseo jayeonseureopge neon ttarawa
D
nan neol seontaekae nan neol seontaekaesseo imi

[Chorus 1]
Em
hollin deut nal ttarawa
A7 D
modu hwanhohae malhaetji Ooh ooh (Oh-eh-oh-eh-oh)
D
gyeolgwan hangsang gata Ooh ooh (Oh-eh-oh-eh-oh)
D#m
geobwa naega tto igyeosseo

[Chorus 2]
Em
neomu shwipgen oji ma
A7 D
jaemieopjana ije neon Ooh ooh (Oh-eh-oh-eh-oh)
D
beoseonal su eopseo Ooh ooh (Oh-eh-oh-eh-oh)
naegen shwipji Bad boy down.

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