The Vampire King's Runaway Bride— Episode 21

Hotel maid Ruth spent one fateful night with Vampire King Arthur under a blood moon before fleeing. Years later, as a single mother to half-vampire Leo with a costly light sensitivity condition, she takes work at Arthur’s castle and is recognized instantly. Though bitter and harsh at first, Arthur defends Ruth and their son fiercely when Leo is captured, showering his family with devotion and marrying Ruth in a glorious ceremony.