WHAT KOREAN SONG IS THIS AGH ITS DRIVING ME CRAZY?

There's this song that's slow, sounds like OST material. It goes like
"babo cho rom, ah ee cho rom, **more words**... se sang..."
바보처럼, 아이처럼....n then smth smth..

it is not 2am's personal taste OST coz i checked that out already.
wahhh. I heard it at a restuarant and its been stuck in my mind ever
since. halp!!