12 titles recommended if you like The Ancient Magus' Bride
Sacrificial Princess and the King of Beasts
Frieren: Beyond Journey's End
Unnamed Memory
Natsume's Book of Friends
The Ancient Magus' Bride: The Boy from the West and the Knight of the Blue Storm
Seirei Gensouki: Spirit Chronicles
Wonder Egg Priority
Yosuga no Sora
Nagi-Asu: A Lull in the Sea
Chained Soldier
From the New World
Mushi-Shi