The Scholar Who Walks the Night

In Joseon Dynasty, immaculately dressed in scholarly robes, the young nobleman Kim Sung Yeol lives as a vampire to keep his promise to his friends. When Sung Yeol still was a human, he found out about the vampire Gwi who sits above the King deciding the next royal line and has resurrected as a vampire trying to fight against Gwi. And now, he is living as a guardian vampire fighting against the evil vampire without losing his human nature.
(Source: MBC)
~~ Adapted from the manhwa "The Scholar Who Walks the Night" (밤을 걷는 선비) by writer Jo Joo Hee (조주희) and artist Han Seung Hee (한승희).