뿐인데

it's just...

→ 뿐
phrase Rare #17,179
it's just... Used to emphasize that something is the only thing or amount involved, often with an implied contrast or request. It can follow a noun, number, or nominalized verb phrase.
KO: 도와달라는 말일 뿐인데 왜 화를 내요?
EN: I'm just asking you to help—why are you getting angry?

세 명 뿐 인데 자리 좀 채워

There are only three of us, so please fill in the empty seats.

— 홍등 (1991)

필요한 건 하나 뿐 인데 좀 도와줘요

I only need one thing—could you help me?

— 신경쇠약 직전의 여자 (1988)

그냥 기분이 안 좋은 뿐 인데

I'm just in a bad mood, that's all.

— 러브 액츄얼리 (2003)