teojilgeot gateun oeroume
keuge hansumeul swieo boado
gibuni gwaenchanhajijil anha

barkge utgo miso jieodo
modeun geoseun geudaerojiman
gireul chaja hemaego isseo

I am so happy happy
nan haengbokhaenneunde
wae oneureun tto
ireoke jichyeoinneunde

I am so happy happy
nan haengbokhaenneunde
wae oneureun tto
seulpi jami deuneunde

baram buneun ohu jina
dari tteuneun bami chajawa
gibuni sseok jochiga anha

jami deulgo kkaeeonamyeon
geunyang joha utgo tteodeuldeon
eorin sijeollo doragagopa

I am so happy happy
nan haengbokhaenneunde
wae oneureun tto
ireoke jichyeoinneunde

I am so happy happy
nan haengbokhaenneunde
wae oneureun tto
ireoke seulpi uneunde

English Translation Lyric (cr: popgasa)

I let out a big sigh because of my loneliness that’s about to burst
But my heart doesn’t feel better
I brightly laugh and smile but everything stays the same
I am lost, looking for the path

I am so happy happy
I was happy
But why am I so tired today?
I am so happy happy
I was happy
But why am I sadly falling asleep today?

windy afternoon passes and a moonlit [bad word] But I don’t really feel good
When I fall asleep and wake up
I want to go back to my youth when I used to laugh and chat

I am so happy happy
I was happy
But why am I so tired today?
I am so happy happy
I was happy
But why am I sadly falling asleep today?