English Translation:

I thought it'd look good so I took out the clothes
I haven't made any plans yet
But because this night is so beautiful
I'm gonna put on my headphones to block the sounds of the world
With an ice cube in my mouth
I'm gonna freely go out on this street

Feel it differently, look at it differently
Even if it feels like you're walking around in circles
Because I love myself, because I'm so me
This time is so beautiful

Cool World Cool World, it's mine
Cool World Cool World, it's my dream
Cool World Cool World, it's mine
Cool World Cool World

I'm thinking if I should wear my favorite shoes
It's telling me that it'll take me to where I want
Like Dorothy in Oz
I'm gonna cover the eyes of the world for a bit
I wanna start this party that I made however I wanted
I'll invite you first, honestly

Wherever I am, if it's you
I'll save a spot for you right here
I've never met you but
Don't you feel that we're so close?
My Cool World Cool World

Feel it differently, look at it differently
Being more different is what makes you special
Because I love myself, because I'm so me
I'm the best friend to myself

Romanized:

Jal eoullineun oseul kkeonaesseo miri jeonghae dun yaksok
Geureon geon eopsjiman I bami areumdawoseo
Sesangui soeumdeul jamsi dadeulge hedeuponeul kkigo
Eoreum ip ane hana mulgo I gireul naseol tenikka
Jayuropge

Jom dareuge neukkyeo jom dareuge bwa
Saramdeul soge geotdoneun deushaedo
Nal saranghaeseo naega nadawoseo
I sigandeuri deo areumdaun geoya

Cool world cool world namanui geot
Cool world cool world namanui kkum
Cool world cool world namanui geot
Cool world cool world

Akkideon gudureul sineulkka saenggakhae
Wonhaneun gose deryeoda jundago hajanha
Ojeuui dorosicheoreom na
Sesangui siseondeul jamsi garilge
Maeumdaero kkumin meosjin patireul sijakhallae
Maen cheoeum neol chodaehalge sasil mariya

Jom dareuge neukkyeo jom dareuge bwa
Saramdeul soge geotdoneun deushaedo
Nal saranghaeseo naega nadawoseo
I sigandeuri deo areumdaun geoya

Cool world cool world namanui geot
Cool world cool world namanui kkum
Cool world cool world namanui geot
Cool world cool world

Eodieseodo naccseon neoramyeon
Yeogie neol wihan jaril biulge
Mannan jeok eopseossjiman aju gakkai issdaneun
Geureon neukkimi neukkyeojiji anhni
Naui cool world cool world
Naui cool world cool world

Jom dareuge neukkyeo jom dareuge bwa
Saramdeul soge geotdoneun deushaedo
Nal saranghaeseo naega nadawoseo
I sigandeuri deo areumdaun geoya

Jom dareuge neukkyeo jom dareuge bwa deo dareudan geon teukbyeolhan georago
Nal saranghaeseo naega nadawoseo nan choegoui chinguga dwae naegen

Cool world cool world namanui geot
Cool world cool world namanui kkum
Cool world cool world namanui geot
Cool world cool world