Heartbeat - Season 1 (2023)

Vampire Woo-hyeol has one desperate wish: to become human and experience heart-pounding love. He tried many ways to become human, but none of them worked. After hearing from a 1000-year-old cat that he can become human if he sleeps in a hawthorn coffin for 100 years, he enters the coffin for a lengthy slumber.

With only one day left in his 100-year goal, he fails to become a human being. He is even bitten by a woman, In-hae, causing him to faint. Yang-nam advises him to keep her by his side and watch her over, as she doesn't seem to be an ordinary person. Meanwhile, In-hae encounters a real estate scammer and gets involved in a chase to catch the fraudster, but finds herself in danger.

In-hae finds out that Woo-hyeol is a real vampire. However, what Woo-hyeol buys with her credit cards even makes her more shocked. She threatens to sell the mansion if Woo-hyeol can't repay his debt and starts living with him under a contract. Woo-hyeol reunites with two vampires named Sang-hae and Dong-seop in the second-hand market. They lament the world in which vampires are drained by humans.