It is not witches who bend over to girls in witch season, but demons!
You didn't look carefully ~
In order to destroy the last book that could kill him, the devil attached it to the girl, making everyone think that she was a witch, and then he could take him to the place where the book was stored, because the devil didn't know where the book was, but he knew that the witch would be sent to the place where the book was stored, so he pretended to be a witch.