Scholar Who Walks the Night (2015)

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In Joseon Dynasty, immaculately dressed in scholarly robes, the young nobleman Kim Sung Ryeol lives as a vampire to keep his promise to his friends. When Sung Ryeol 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.