KBS 2TV’s “Heartbeat” has shared a sneak peek of a tense encounter between 2PM’s Taecyeon, Won Ji An, and Yoon So Hee! “Heartbeat” is a fantasy romance drama starring Taecyeon as Seon Woo Hyul, who is half-human and half-vampire. Although he desperately wants to become human, he misses his chance because of one fateful day