The Ancient Magus' Bride Season 2

Chise was able to accept Elias and herself, if not necessarily everything about her situation. After Cartaphilus fell back into a slumber that would not last forever, Chise was able to go back to her regular life. Then she receives an invitation from a mutual aid organization for mages called the College. Under the British Library exists a secret society of mages. Encounters and interactions with people are about to open some new doors. This is a story about saving yourself to save another.

Synopsis from Anime News Network