Stories about witches honing their powers are a fun fantasy version of the coming-of-age premise. Sometimes they study at prestigious, esoteric magic academies; or they're taught in more casual settings where they work a kind of practical magical internship, guided by a mentor. Though the trope seems rather specific, there are several anime titles with fresh takes on it.
Source：https://www.cbr.com/best-anime-about-training-witches/
