Two words from a wedding. Attached to a different question.
Track five on THIS & THAT. It premiered at the Seoul stop of the RUN IT world tour on July 25, before the album came out.
Changbin (3RACHA) wrote the lyrics. Changbin, RESTART, and Chae Kanghae composed it. It’s the cleanest rock sound on the album.
Start with the title. In English, “I do” is what you say at a wedding. Two words answering whether you’ll stay for life.
This song attaches those words to a different question. Do you feel my pain too? I do.
Stray Kids “I Do” — Korean Meaning & Lyrics Explained
Chorus — I Do
I do
Feel the same pain as you
Every scar, every wound
I do
Even when you feel alone
I’ll be right here, never gone
The song opens on the chorus. No setup. It answers first.
“I do” lives in two places in English. A wedding vow, and an emphatic yes to a question. Do you feel it? I do.
Both are working here. It confirms shared pain, and it promises presence.
Verse 1 — Mun-deu-reo-jyeo (문드러져)
Mo-du-deul Ha-na-ssik-eun Ga-ji-go In-neun Geo
모두들 하나씩은 가지고 있는 거
Something everyone has at least one of
Ga-seum-sok Gip-i Bak-hyeo Ppa-ji-ji An-neun Geo
가슴속 깊이 박혀 빠지지 않는 거
Lodged deep in the chest, and it won’t come out
Mal Mot Ha-go Hon-ja Sum-gi-go It-ji
말 못 하고 혼자 숨기고 있지
Can’t say it, hiding it alone
A-mu-reot-ji A-neun Cheok-ha-myeon-seo-do
아무렇지 않은 척하면서도
While pretending nothing’s wrong
Ji-u-ryeo Hae-do Gal-su-rok Beon-jyeo
지우려 해도 갈수록 번져
Try to erase it and it spreads further
Ut-go It-eo-do Sok-eun Mun-deu-reo-jyeo
웃고 있어도 속은 문드러져
Smiling on the outside, rotting on the inside
You thought you had to hold it on your own
But I feel it too
This verse is the center of the song.
The chorus said it felt the same pain, named every scar and wound. Now it explains what that means.
Everyone has at least one. It’s lodged in the chest and won’t come loose. Everyone pretends nothing’s wrong. Try to erase it and it spreads instead. Smiling on the outside, rotting on the inside. And you think you have to carry it alone.
The last two lines break that assumption. I feel it too.
Cheok-ha-da (척하다, “to pretend”) — pretending to be fine, pretending not to know, pretending something doesn’t bother you. A very common construction in Korean.
Beon-ji-da (번지다, “to spread/bleed”) — used for ink or color spreading, and for emotions or wounds widening. Ji-u-ryeo hae-do gal-su-rok beon-jyeo (지우려 해도 갈수록 번져) is the image of something spreading further the harder you try to remove it.
Mun-deu-reo-ji-da (문드러지다, “to rot/fester”) — something going soft and shapeless as it decays.
Pre-Chorus — You Don’t Have to Carry That
You don’t have to carry that all alone
I feel everything you do
Verse 1 painted the pain nobody else knows about. This flips it.
You don’t have to carry it alone. Everything you feel, I feel.
Bridge — Mu-neo-jin Geot Ga-ta Bo-yeo-do (무너진 것 같아 보여도)
Like a sandcastle in the rising tide
All the dreams we tried so hard to hide
Mu-neo-jin Geot Ga-ta Bo-yeo-do
무너진 것 같아 보여도
Even if it looks like it collapsed
Sa-ra-jil Geot Ga-ta Bo-yeo-do
사라질 것 같아 보여도
Even if it looks like it’ll disappear
We’re gonna find a way to rise (alright)
A sandcastle going under with the tide. Dreams that got hidden.
The two Korean lines repeat the same structure: “-geot ga-ta bo-yeo-do.” Even if it looks collapsed. Even if it looks like it’s disappearing. Neither line says it actually happened. Only that it looks that way.
Verse 2 — Kkeut-i An Bo-il Deut-han Teo-neol (끝이 안 보일 듯한 터널)
Sometimes the night feels way too long
Kkeut-i An Bo-il Deut-han Teo-neol
끝이 안 보일 듯한 터널
A tunnel that seems to have no end
Beo-tyeo On Si-gan-deul-e Dae-han Bo-sang
버텨 온 시간들에 대한 보상
A reward for all the time you endured
Ji-geum I Sun-gan
지금 이 순간
This moment, right now
Gin Bam-i Kkeut-na
긴 밤이 끝나
The long night ends
Beo-ti-da (버티다, “to hold out/endure”) — getting through a hard situation by holding on. Not winning or overcoming. Closer to remaining standing.
Teo-neol (터널, “tunnel”) — Korean commonly frames hard periods as tunnels. The image is being inside something with no visible end. The phrase gin teo-neol-eul ji-na-wat-da (긴 터널을 지나왔다), “came through a long tunnel,” also gets used when a difficult stretch is ending.
And then a reward arrives. For all the time spent enduring. That reward is this moment, and the long night ends.
Outro — Jeo Kkeut-kka-ji (저 끝까지)
I do, I do
I can feel it too
I feel it too
I do, I do
Yeah it’s me and you
It’s me and you
I do, I do
I’m in it with you
Jeo Kkeut-kka-ji We’ll always be together
저 끝까지 we’ll always be together
To the very end, we’ll always be together
I’ll be right here with you
The last place Korean appears in the song.
Jeo kkeut-kka-ji (저 끝까지, “to the very end”) — all the way over there, to that far end. It marks distance, and it gets used for time too. Going as far as the point you can’t see.
It connects back to kkeut-i an bo-il deut-han teo-neol (끝이 안 보일 듯한 터널) in Verse 2. A tunnel with no visible end, walked together all the way to that end.
And the song shifts position here. The first “I do” was a confirmation of feeling: I feel your pain too. “I’m in it with you” goes a step further. Not someone who understands, but someone who stepped inside the situation with you.
What Does “Mun-deu-reo-jyeo” (문드러져) Mean in “I Do”?
Mun-deu-reo-ji-da (문드러지다) describes fruit or flesh going soft and pulpy, or something rotting from within.
But Korean also uses it for emotion. Sog-i mun-deu-reo-jin-da (속이 문드러진다) means pain that never got expressed has been festering inside for a long time. Frustration or resentment that built up and decayed.
Ut-go it-eo-do sok-eun mun-deu-reo-jyeo (웃고 있어도 속은 문드러져) — a smiling face and rotting insides. The whole way Korean uses physical sensation to describe emotion is in that one line.
Translate it as “hurting inside” and only the state survives. Mundeureojida involves time. It got that way because it was held in too long.
What Is Stray Kids’ “I Do” Really About?
The title answers it.
In English, “I do” is a wedding vow. The response to being asked whether you’ll stay for life. This song attaches those two words to an entirely different question.
Do you feel my scars? Are you here even when I feel alone? I do.
Verse 1 describes pain nobody was told about. Lodged in the chest and won’t come loose, spreading further the more you try to erase it, rotting inside behind a smile.
Then the chorus answers. So do I.
Which is why jeo kkeut-kka-ji (저 끝까지) lands where it does. A song that opened in the language of a vow closes on the sentence of one. Just addressed to someone other than a spouse.
내부 링크
THIS & THAT is an eight-track album. More breakdowns from it:
Stray Kids “This & That” — Why They Refuse to Pick One

Stray Kids “RUN IT” — From a Small Room to the World
Stray Kids “After You” — The “You” Might Not Be a Person
Stray Kids “FARMING” — The Meme, the Grind, and a Work Song
Stray Kids “I Do” — A Wedding Vow Rewritten for Pain
Stray Kids “Way Out” — The Coldest Track on the Album
ATEEZ put a Korean chili pepper between a Cuban cigar and Spanish fuego:
ATEEZ “BAD” — Where Cheongyang Chili Meets a Latin Rhythm

CORTIS builds their whole identity on two colors. “RedRed” is where that starts:
CORTIS “RedRed” Full Lyrics Explained — Every Line Broken Down

After the Grammys announced an Asian Pop category, this song started sounding like a prediction. Where does it go from here?
BTS “Aliens” Lyrics Explained — What the Translation Misses

Is there a K-Pop song that clearly means something more — but you can’t tell what? Drop it in the comments and I’ll break it down.
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