'I should've told you it was okay' is the title

In three lines

• The teaser for So Soo Bin's 'I Should've Said' came out on August 25.
• The Korean title reads '괜찮다고 말해줄 걸 그랬어' — I should've told you it was okay.
• Both titles speak of something not done.

The clip below is a teaser, not the full track. The song hasn't been released yet.

What arrived two days ago

Item	Detail
Artist	So Soo Bin
Song	'I Should've Said (괜찮다고 말해줄 걸 그랬어)'
Teaser	August 25

A title that speaks of what wasn't done

'~할 걸 그랬어' is the form of regret — a phrase used about something not done.

Its tense is unusual. It speaks of the past, yet not a past that happened. It's a sentence supposing a past that never occurred.

The English title 'I Should've Said' has the same structure. It means the saying should have happened, so the fact of not having said it is built in. A rare case of two languages pointing the same way.

What went unsaid

What went unsaid in the title is '괜찮다' — that it's okay.

That's a comforting phrase, and not a difficult one. It needs no long explanation and no preparation.

If it still didn't get said, there was a reason, and that reason is likely the song's content: what circumstance made an easy phrase impossible.

Only the teaser so far

Only the teaser has been released. The full track isn't out yet.

A teaser for a song about regret sits in a slightly odd position. A teaser is a form announcing what's coming, while the song's content speaks of what has already passed.

A forward-looking form carrying backward-looking content. That mismatch resolves when the track arrives; for now it stands.

Discovery note

Listen to the teaser as sound only. Check whether this lands on the regret side without knowing the title.

Then listen again knowing it. Whether the ending '~할 걸 그랬어' is audible in the sound is the checkpoint.

Last, when the full track appears, find where the teaser's portion sat inside it. Right now that position is unknowable.

Just give it a listen, trust me.