Heartbeat (Korean 가슴이 뛴다) is an ongoing South Korean television series starring  Ok Taec-yeon, Won Ji-an , Park Kang-hyun, and Yoon So-hee.Half-human and half-vampire Seon Woo-hyul (Ok Taec-yeon) somehow starts to live together with coldhearted woman Joo In-hae (Won Ji-an). The two fall in love with each other, bringing warmth into their lives.


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