After per-releasing "Field Trip" off of his new album '6 PM… Ground', actor So Ji Sub has now revealed a music video teaser for the title track, "Eraser" featuring female soloist Mellow!

The teaser doesn't give away much of the song, but from what we can tell, the love interest, played by actress Park Shin Hye, is living a pretty content life. However, So Ji Sub calls, but the call goes to voice mail, so he leaves a message that completely stuns her to the point that she breaks into tears.

The surprising fact is that the message isn't mean or scary at all. So Ji Sub says, "Honey, it's me. What are you doing? Are you busy? I'll be waiting for your call so call me back, I'm in front of your house.,"  then he hangs up.  Talk about a tease, fans are desperate to know why such simple words can shock Park Shin Hye's character so much.

Watch the heart wrenching clip below. What do you think is the reason she gets so upset?