Sori has officially kicked off her comeback promotions with the teaser release for her fourth digital single, "Dancing Heart"! Revealed on March 2nd, the teaser features actress Jun Se Hong, who shows a heartbreaking appearance while the narration muses, "In the pain of a woman's heart, only one man lives. That is why I held you back, right then and there. Watch, looking at you drives me crazy." JS Prime Entertainment stated, "Unlike what Sori has been known for thus far, the song will feature a new, more emotional side to her." Check it out below! Sori's full single will drop on March 4th through various online music sites, and her comeback stage will be held on the same day through KBS's "Music Bank." Source: Newsen via Nate