Eru Stole The Song That MC Mong Wrote For His Girlfriend?

Kind of, but not quite. Singer MC Mong guest-starred on this week's episode of KBS 2TV's Imagine More where he shared a bittersweet anecdote with the hosts and the audience. "I wrote a song for my girlfriend (Joo Ah-min) for our anniversary. That song is really special gift for my girlfriend from me, so I refused to put it in any of my albums or give it to anyone else," he said. "I also promised her that I wouldn't make any profit off this song because it's special." He went on, "However, the very song that I especially wrote and composed for my girlfriend was sold to someone else. The singer Eru heard the song and begged me to let him sing it. At first, I was really reluctant to let him sing it but I ended up giving it up to him in the end." Aw, poor MC Mong. I wonder how his girlfriend felt about this. Better yet, I wonder which Eru song it is?