Silent Witch Author Matsuri Isora's Boukyaku no Curse Knight Launches November 13 With Shirotaka Art

Matsuri Isora (依空まつり), the author of Silent Witch, is bringing her latest fantasy series 『忘却のカースナイト』 (Boukyaku no Curse Knight) to print. The author's official web-novel page states that Volume 1 will launch under the Earth Star Novel label on November 13, 2026, with Shirotaka providing the illustrations.

The story originally began serialization on Shosetsuka ni Naro on March 6, 2026. Its protagonist is Theo, a 14-year-old boy determined to become his ideal knight despite carrying a curse that causes people to forget his very existence.

Quick Summary

• Japanese title: 忘却のカースナイト
• Romanization: Boukyaku no Curse Knight
• English rendering used by the source post: The Curse Knight of Oblivion
• Status of that English title: not confirmed as an official global title
• Original format: web novel
• New format: light novel / book edition
• Author: Matsuri Isora / 依空まつり
• Illustrator: Shirotaka / シロタカ
• Label: Earth Star Novel / アース・スターノベル
• First book: Volume 1
• Current official release date: November 13, 2026
• November 19 date in the screenshot: does not match the author's current primary page
• Web platform: Shosetsuka ni Naro
• N-Code: N3740LW
• Serialization began: March 6, 2026
• Web-novel status: ongoing
• Latest update at verification: September 17, 2026
• Episode count at verification: 116
• Web genre: High Fantasy
• Web rating: R15
• Content notice: violent depictions
• Protagonist: Theo
• Theo's age in the character profile: 14
• Theo's goal: to become an ideal knight
• Theo's curse: people tend to forget his existence
• World: a land surrounded by the Sea of Oblivion / 〈忘却の海〉
• Threats from the sea: cursed beings / 呪魔（テルメア）
• Holy Knights: receive blessings from angels
• Gray Knights: cursed knights
• How Gray Knights fight: they wield their own curses as weapons
• Story tagline: 汝、騎士たれ。
• Connection to Silent Witch: same author
• Same world as Silent Witch: no
• Author's statement: the series uses a completely different setting from her other works
• Volume 1 price: not yet independently verified
• ISBN: not yet independently verified
• Page count: not yet independently verified
• Digital-edition details: not yet independently verified
• Retailer bonuses: not announced in the sources successfully verified
• Official English license: unannounced
• Current status: web serialization continues ahead of the November 2026 book release

Promotional Illustration and Book Announcement

The Current Release Date Is November 13, Not November 19

The Manga Mogura RE post that prompted this article lists November 19, 2026 as the release date for The Curse Knight of Oblivion.

The current primary source says otherwise.

The official Shosetsuka ni Naro page for Boukyaku no Curse Knight, maintained as Matsuri Isora's work page, now carries a notice stating that Volume 1 will be released by Earth Star Novel on November 13, 2026.

That notice appears on the same live page updated with the latest story episode on September 17. Because it comes directly from the author's work page and reflects the newer information, November 13 is the date used in this article.

An individual Earth Star product page has not yet been independently located and verified, so the ISBN, price, trim size, page count and retailer bonuses are not being inferred.

Theo Wants to Become a Knight Even If Everyone Forgets Him

At the center of the story is Theo, a blond, green-eyed boy who deeply admires knights.

His greatest obstacle is not simply a lack of experience or strength. Theo carries an Oblivion curse that causes other people to forget his existence.

The official character material identifies Theo as 14 years old. Despite the unusual difficulty this creates in his relationships with others, his ambition remains straightforward: he wants to become a knight he can be proud of.

When the series first launched, Matsuri Isora described him as a serious aspiring knight whose existence is repeatedly forgotten by the people around him.

The contrast between wanting to leave behind honorable deeds and carrying a curse that removes him from memory forms one of the story's central foundations.

The Sea of Oblivion, Holy Knights and Gray Knights

The world of Boukyaku no Curse Knight is built around a land surrounded by the 〈忘却の海〉, or Sea of Oblivion.

From that sea come invasive cursed beings known as 呪魔（テルメア）, one of the major threats facing humanity.

On one side stand the Holy Knights, warriors granted blessings by angels and recognized as protectors of society.

Behind them exists a very different group: the Gray Knights.

Rather than receiving blessings, Gray Knights are people burdened by various curses. They do not merely live with those conditions—they use their curses as weapons in battle.

Theo himself later becomes identified as a Gray Knight carrying the Oblivion curse, making the “curse” in the title a direct part of both the world's power system and the protagonist's identity.

From a March Web Novel to an Earth Star Novel in November

The web serialization began on March 6, 2026, putting the move from web debut to Volume 1 at roughly eight months.

In her original launch note, Matsuri Isora specifically stated that Boukyaku no Curse Knight takes place in a completely different world from her other works.

Its connection to Silent Witch is therefore its creator, not a shared universe or story continuity.

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Isora also said when the web novel launched that starting the new series was not intended to slow her work on the Silent Witch books or the ongoing White-Winged Harpy serialization.

As of September 17, the web version has reached 116 episodes and remains ongoing. It has not yet been detailed how much web material Volume 1 will cover or how extensively the book edition will revise or expand it.

Shirotaka Gives the New Series Its Own Visual Identity

The book illustrations are handled by Shirotaka, an illustrator with a long history in fantasy light novels and widely known for illustrating the Mushoku Tensei novels.

The promotional image accompanying the announcement presents three characters against a European-inspired fortified city, with white birds filling the foreground and sky.

Shirotaka's involvement gives Boukyaku no Curse Knight a visual identity distinct from Silent Witch, whose light novels are illustrated by Fujimi Nanna.

Because an individual Earth Star retail product page has not yet been independently verified, the currently circulating artwork is more safely described as a promotional illustration for the book release rather than definitively labeling it the final retail cover.

Why This Matters

1) The book arrives roughly eight months after the web novel began

Serialization only started in March 2026, while Volume 1 is already scheduled for November of the same year.

2) Being forgotten is directly tied to the protagonist

Theo's curse is not simply background lore; it shapes his relationships and directly conflicts with his wish to become a memorable, honorable knight.

3) Curses also function as weapons

The Gray Knights add another layer to the usual holy-knight fantasy structure, with cursed individuals weaponizing the very conditions that afflict them.

4) This is not a Silent Witch spin-off

Matsuri Isora made clear from the first day of serialization that Boukyaku no Curse Knight exists in a completely different setting from her other works.

Light Novel Information

For now, the additional important information currently known includes:

• the Japanese title is 忘却のカースナイト
• the romanized title is Boukyaku no Curse Knight
• “The Curse Knight of Oblivion” appears as an English rendering in the secondary source post
• that wording has not been confirmed as an official English-market title
• the work is written by 依空まつり / Matsuri Isora
• the book illustrations are credited to シロタカ / Shirotaka
• the book will be published under Earth Star Novel
• Volume 1 is the announced book
• the author's live web page currently lists November 13, 2026
• the November 19 date in the screenshot is not being used because it conflicts with the newer primary source
• web serialization began on March 6, 2026 at 12:00 PM JST
• the web novel remains ongoing
• the latest episode at verification was published September 17, 2026
• the live page currently contains 116 episodes
• its official Shosetsuka ni Naro genre is High Fantasy
• the work carries an R15 label
• the web page warns of violent depictions
• the protagonist is Theo
• Theo is 14 years old in the character material
• Theo wants to become a knight
• Theo carries a curse that causes others to forget him
• he is later described as a Gray Knight carrying the Oblivion curse
• the Sea of Oblivion surrounds the story's landmass
• cursed creatures coming from the sea are called 呪魔（テルメア）
• Holy Knights receive blessings from angels
• Gray Knights use curses as combat power
• the web novel's tagline is 汝、騎士たれ。
• the author says the story has a different world setting from her other works
• no narrative connection with Silent Witch has been announced
• the official Volume 1 price has not yet been independently verified
• the Volume 1 ISBN has not yet been independently verified
• the page count has not yet been independently verified
• simultaneous digital-edition details have not yet been independently verified
• preorder and retailer bonuses have not yet been independently verified
• an individual Earth Star product page had not been located at verification
• the exact Manga Mogura X status URL from the screenshot could not be independently resolved and is therefore not being used as an embed
• no official PV or trailer was found, so the article does not use video or Short/Reels blocks
• the web novel is available through Boukyaku no Curse Knight on Shosetsuka ni Naro
• the author's original launch note is available through the Matsuri Isora Launch Note
• the author's other works are available through the Matsuri Isora Author Page
• label information is available through Earth Star Novel
• official Silent Witch information is available through KADOKAWA Books

Closing

Boukyaku no Curse Knight takes Matsuri Isora into a new fantasy world built around memory, curses and two very different paths of knighthood. After running as a web novel since March, Volume 1 is now scheduled for November 13, 2026 through Earth Star Novel with illustrations by Shirotaka.

Product details including price, ISBN, page count, retailer bonuses and a possible simultaneous digital edition have not yet been independently verified. For now, the most current information comes directly from the author's web-novel page, where the story itself continues through its September 17 update.