The Classroom of a Black Cat and a Witch episode 21 is coming to screens this weekend. The fantasy anime, which started airing in April 2026, continues its first season with new episodes every Sunday. Episode 21 marks another step in Spica Virgo’s journey at the Royal Diana Academy.
The show follows a young girl named Spica Virgo who cannot use magic but dreams of joining a prestigious magic school. She meets a talking black cat who is actually a powerful wizard named Claude Sirius trapped in a cat’s body by a curse. Claude agrees to teach Spica magic in exchange for her help breaking his curse. The series is produced by studio LIDENFILMS and is based on the manga by Yosuke Kaneda.
Episode 21 Release Date and Time
The Classroom of a Black Cat and a Witch episode 21 releases on Sunday, August 30, 2026. New episodes come out every Sunday at the same time.
The exact release times are:
- Pacific Daylight Time (PDT): 7:30 AM
- Eastern Daylight Time (EDT): 10:30 AM
- Greenwich Mean Time (GMT): 2:30 PM
Episode 21 will run for about 24 minutes. The show has a total of 24 episodes planned for its first season. Episode 22 will follow on September 6, 2026, and the season finale is expected on September 20, 2026.
Where to Watch Episode 21
You can watch The Classroom of a Black Cat and a Witch episode 21 on Crunchyroll. The platform streams the series with English subtitles as it airs in Japan. The show is available in multiple regions worldwide. It also airs on TBS in Japan.
What Happened Before Episode 21
The story has moved forward quite a bit since the first episode. Spica started as a girl who could not use any magic at all. She met a black cat who turned out to be Claude Sirius, a famous wizard and the youngest instructor at the Royal Diana Academy. Claude had disappeared mysteriously and was cursed into a cat form. Spica kissed the cat to break part of the curse, which revealed Claude’s true form. But because Spica’s magic is still too weak, Claude remains stuck as a cat most of the time.
Since then, Spica has joined the academy and made friends with other students like Io Taurus, Ewe Aries, and Aria Aquarius. She has faced many challenges, including midterm exams and training exercises. She also learned that she has something called “Rebirth Magic,” which gives her the power of regeneration.
Episode 19, titled “Race for the Ruby,” showed Spica competing with Capella, Leo, and Ewe to get a ruby from a demonic bird’s beak. The students had to collect gems to pass their finals. Episode 20 continued the finals arc, with the Claude Coven on an island completing their exams.
The story has also introduced bigger conflicts. The coven has had to escape from characters named Arc and Rigel. Claude has told Spica the truth about the attack on Diana and the capital. These events have raised the stakes for the characters and set up important developments for the remaining episodes.
Main Cast and Characters
The voice cast for The Classroom of a Black Cat and a Witch includes:
- Kaede Hondo as Spica Virgo
- Nobunaga Shimazaki as Claude Sirius
- Fuka Izumi as Aria Aquarius
- Minori Suzuki as Merrow Pisces
- Azusa Tachibana as Ewe Aries
- Haruka Shiraishi as Io Taurus
- Yuto Uemura as Castor Gemini
Theme Songs
The opening theme song is “Cusp” performed by ASCA. The ending theme song is “Tune Up” performed by Spira Spica.
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What to Expect in Episode 21
Episode 21 will continue the story as the Claude Coven faces more challenges. With the finals arc ongoing, Spica and her friends must prove their skills. The episode will also likely address the growing conflicts involving Arc and Rigel. As the season moves toward its final episodes, the story is building toward bigger reveals about Claude’s curse and the dangers facing the magic world.
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