일은 미안해

I'm sorry about that

→ 일
phrase Rare #31,877
I'm sorry about that 일은 means “as for the matter/what happened”; the subject “I” is understood from context.
KO: 어젯밤 일은 미안해.
EN: I'm sorry about what happened last night.

나도 탠저린 일은 미안해

I'm sorry about the tangerine thing too.

— 불릿 트레인 (2022)

어젯밤 일은 미안해.

I'm sorry about last night.

그래, 그 일은 미안해

Yeah, I'm sorry about that.

— 빅 식 (2017)