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LaLaLa...
LaLaLa...

Gunugurado jalmotggi wuh buhrin
Danchu hana chuhrum
Utgal lyuh buhri nun nal itgehjo

Nan mitgo it sut jiman sol jik
Han ma um weh myun han duh
Muluh juh ganun dwit mo soop
Bomyuh ahmoo mal halsoo upsuhjo

Jigum e dero jun hago shipuh
Jamgyuh itdun maum ehyul sweh ga
E gasum sokeh bitnago itsuh yo
Duh wook gang hage jikigo shipuh
Sel soodo upshi man eun chuwukul
E uh joogo itnun e room eun
Just a Key of Heart

(I believe love to heart)
(I believe love to heart)

Mian hadago e yagi handa
Myun al soo it suhdo
Honja suh mal hal soon upgehjo

Gu dero jigum nawah gattun
Senggak hago itnun guh jo
Un myung e woo ril buru nika
Gude rul hyanghae gahnun kul

Jigum e dero jun hago shipuh
Jamgyuh itdun maum eh yul sweh ga
E gasum sokeh bit nago it suh yo
Nunul gamunche, gido halkke Yo
Doogun guhrinun e maum modoo
Gude eh gaejunhae jidorok
Just a Key of Heart

Woo yunhee gude mannan kijukdo e
Sesanghae taeuh nana uy mido
Juhmada suhro gasumhae saeginche
Mang sullim upshi jap atdun
Gudewa naman uy jakeun yaeghee nun
Kutnaji anke hago shipuh
Just a Key of Heart

LaLaLa...
LaLaLa...
LaLaLa...   LaLaLa...      Gunugurado jalmotggi wuh buhrin   Danchu hana chuhrum   Utgal lyuh buhri nun nal itgehjo      Nan mitgo it sut jiman sol jik   Han ma um weh myun han duh   Muluh juh ganun dwit mo soop   Bomyuh ahmoo mal halsoo upsuhjo      Jigum e dero jun hago shipuh   Jamgyuh itdun maum ehyul sweh ga   E gasum sokeh bitnago itsuh yo   Duh wook gang hage jikigo shipuh   Sel soodo upshi man eun chuwukul   E uh joogo itnun e room eun   Just a Key of Heart      (I believe love to heart)   (I believe love to heart)      Mian hadago e yagi handa   Myun al soo it suhdo   Honja suh mal hal soon upgehjo      Gu dero jigum nawah gattun   Senggak hago itnun guh jo   Un myung e woo ril buru nika   Gude rul hyanghae gahnun kul      Jigum e dero jun hago shipuh   Jamgyuh itdun maum eh yul sweh ga   E gasum sokeh bit nago it suh yo   Nunul gamunche, gido halkke Yo   Doogun guhrinun e maum modoo   Gude eh gaejunhae jidorok   Just a Key of Heart      Woo yunhee gude mannan kijukdo e   Sesanghae taeuh nana uy mido   Juhmada suhro gasumhae saeginche   Mang sullim upshi jap atdun   Gudewa naman uy jakeun yaeghee nun   Kutnaji anke hago shipuh   Just a Key of Heart      LaLaLa...   LaLaLa...