Singer Eru is rising as Korea's greatest 'break-up' man.

Eru recently released a new song for the OST of MBC's "Rascal Sons," and is volunteering to speak for the men who are broken up with.

With his debut song, "Black Glasses," he continued to sing about such break-ups with "White Snow," "If I'm Born Again," and "I Hate You." He will again take this place with his new song that will be listed in the OST.

Many who know him are worried that the song will become the truth for the singer.

His new song, "One Person," will be a song for Kim Young Hoon, who must stay away from Han Hye Rin despite being in love with her, and it was composed by Kim Jae Gon, who is a rising star in the world of drama OSTs.

This is Eru's 9th collaboration for a drama OST after "Baking King Kim Tak Goo," "Grape Field Man," "Kyungsung Scandal," and many others.