Kuroi Majo to Shiroi Seijo no Hazama de - Arasa Majo, Seijo ni naru!

Nobara, a woman in her late twenties who works for a black company, wakes up in a grassy field and learns that she has been reincarnated into a world with a rabbit with horns. Guided by a black cat, she gradually learns magic from books. As an apprentice witch, she uses her magic to help people, but...