The Ancient Magus' Bride: The Boy from the West and the Knight of the Blue Storm

魔法使いの嫁 西の少年と青嵐の騎士

Set between the two television seasons, this three-part OVA follows Chise Hatori and the magus Elias Ainsworth as the Wild Hunt — a band of mounted fae knights that wakes only once in decades — stirs near their home. When lightning splits the stone where the Hunt sleeps, it scatters the band's guide, and the riders' restless energy weighs hardest on Chise, whose nature as a Sleigh Beggy leaves her sensitive to it. Their search crosses paths with Gabriel, a sickly London boy struggling to settle into the countryside.