Nunbusin achim haessare buseuseu nuni tteojideon geu nal
Ganjireoun neukkime useumi nawa
Deullineun radiosori hyanggeutan keopihyanggiwa hamkke
Oneureun gibun joheun harureul sijakhae

Gwaenseure utge doego haengbokhago neomuna joheungeol
Waenji joheun iri isseul geotman gata

Oh oh happy day oh oh happy smile oh
Oh happy sound oh oh happy life
Oh oh happy day oh oh happy smile
Oh oh happy sound oh oh happy life
Oh my happy day

Gabyeoun balgeoreumeuro sesang sogeuro dallyeonagamyeon
Barami pogeunhage nal gamssajugo
Ttungttunghan ice cream ajeossi pungseon deun yeppeun kkomaaido
Modu da haengbokhage harureul sijakhae

Gireul geotdaga mannan hunnam oppa naege mareul geonnewa
Jeo hoksi yeollakcheo jom al su isseulkkayo

Oh oh happy day oh oh happy smile
Oh oh happy sound oh oh happy life
Oh oh happy day oh oh happy smile
Oh oh happy sound oh oh happy life
Oh my happy day

Oh oh happy day oh oh happy smile
Oh oh happy sound oh oh happy life
Oh oh happy day oh oh happy smile
Oh oh happy sound oh oh happy life
Oh my happy day