The Classroom of a Black Cat and a Witch

Plot

Spica Virgo is a budding witch who admires Claude Sirius, a skilled wizard and teacher who mysteriously vanished one day. However, due to her clumsiness and lack of skills, she feels it is difficult to fulfill her dream of entering Royal Diana Academy, a prestigious magic school where Claude was once a teacher. One day, she encounters a black cat. She is surprised that the cat can talk and asks it for help in entering the academy. After learning that the cat was formerly human but was cursed to have this form, Spica aims to undo the curse. She learns that she has "Rebirth Magic", which gives her the power of regeneration, and that she can undo the curse by kissing the cat's butt. She does so reluctantly, leading the cat to reveal itself to be Claude. With this, Spica enters the academy, with Claude becoming her teacher, with Claude still maintaining a cat form as Spica's magic remains too weak to lift the curse fully.

Characters

Royal Diana Academy

The Coven of Students taught by Claude Sirius at Royal Diana Academy. They are 12 students with potential, but in their own ways are misfits.

Spica Virgo (スピカ・ヴァルゴ, Supika Varugo)

Voiced by: Kaede Hondo

Spica is the main protagonist of the series. She has admired Claude Sirius ever since he saved her during an attack. She comes from a large family of eight. She was able to temporarily lift the curse on Claude so he could appear in human form, although her magic powers remain too weak to make him return to being a human permanently. After their meeting, Spica becomes Claude's apprentice. As a Virgo Mage, she has the ability to manipulate plant life, letting her grow or revitalize any form of nature. She also possesses the rare Rebirth Magic, which is vital for Claude to maintain his human form, and is the main point of contention for The Black Serpents.

Aria Aquarius (アリア・アクエリアス, Aria Akueriasu)

Voiced by: Fūka Izumi

A classmate and childhood friend friend of Spica. Widely regarded as a magic prodigy, she is very confident in her abilities and often has fun at Spica's expense. Nevertheless though, she cares deeply for Spica as well as her other classmates, showing compassion along with her immense talent. As an Aquarius Mage, her magic grants her control over water. Her high level skill with her magic allows her to blast powerful streams of water and even freeze it into blocks of ice.

Io Taurus (イオ・トーラス, Io Tōrasu)

Voiced by: Haruka Shiraishi

A classmate of Spica. She is a soft-spoken and empathetic, though she is also very airheaded and clumsy. While she typically tries to avoid conflict, when her classmates are threatened or hurt, she becomes frighteningly aggressive. Despite this, she always tries her best to help people. Her Taurus magic centers around the physical enhancement of one's own body. Her signature spell enables her to alter her physical size and grow into a giant, with her maximum height being 10 meters tall, bigger than most other users of her magic. She also naturally possesses superhuman strength, being able to lift most heavy objects with ease; though she doesn't know her own strength at times due to her clumsy nature.

Media

Manga

Written and illustrated by Yōsuke Kaneda, The Classroom of a Black Cat and a Witch began serialization in Kodansha's Magazine Pocket website and app on March 16, 2022. The series has been compiled into 15 tankōbon volumes as of July 9, 2026. Kodansha publishes the series in English on their K Manga service.

Anime

An anime television series adaptation was announced on August 5, 2025. It is produced by Liden Films and directed by Naoyuki Tatsuwa, with Midori Gotō handling series composition, Takayuki Onoda designing the characters, and R.O.N composing the music. The series premiered on April 12, 2026, on the Agaru Anime programming block on all JNN affiliates, including CBC TV and TBS, and will run for two consecutive cours. For the first cours, the opening theme song is "Cusp", performed by Asca, while the ending theme song is Tune Up☆ (ちゅーんあっぷ☆, Chiyun Apu☆), performed by Spira Spica. For the second cours, the opening theme song is "∞Rettōsei" (∞劣等星; Infinitely Inferior Star), performed by Akari Nanawo, while the ending theme song is "Twilight Magic", performed by Shoko Nakagawa. Crunchyroll is streaming the series. Medialink licensed the series.