Pls pls help me find the title of this Korean drama.

The basic plot as far as I can remember is the main character guy works at a KTV/VIdeoke(?) place and there's a girl that only appears every midnight/12AM, I can't remember if she's a ghost or something.

Actually I'm not sure if it's the girl that works there or the dude, but that's the plot I am remembering.

I can vaguely remember the title as 12:00 or 00 AM something somethingn. but nothing shows up.