The Ancient Magus' Bride: Midsummer Pilgrimage

A non-human creature lives alone in London's nighttime streets, far from the world of daylight and ordinary people. One evening, a young woman emerges from the fog asking for help. Her memories are gone and she has no idea why she is there. He brings her out of the darkness, and the two form an unlikely friendship — his first real one. Determined to help her recover what she has lost, he seeks out two figures known only through rumors among the fae: the Thorn Mage Elias and a girl named Chise.