를 하나

one

→ 를
phrase Rare #20,450
one A noun or object marker followed by 하나, used to request or indicate one item; the noun is often understood from context.
KO: 커피를 하나 주세요.
EN: Please give me one coffee.

네이튼 오래전에 보낸 편지를 하나 찾았지.

I found a letter Nathan sent me a long time ago.

— 조조 래빗 (2019)