Demons' Crest
Demons' Crest is a Japanese light novel series written by Reki Kawahara and illustrated by Yukiko Horiguchi. It has been published by ASCII Media Works under its Dengeki Bunko imprint since November 2022. A webtoon adaptation illustrated by TOmoe began serialization on 's HykeComic platform the same month. The light novel series has been licensed for English release in North America by Yen Press under its Yen On imprint. An anime television series adaptation has been announced.
Plot
On June 6, 2031, playtesting begins for the VRMMO game Actual Magic. Yuuma Ashihara, an elementary school student, is one of the play testers. He is initially amazed by the realistic fantasy world the game created. However, upon logging out, the game begins fusing with reality, turning one of the most beautiful girls in his class, Sumika Watamaki, into a horrifying monster. Yuuma must figure out how to survive despite the chaos and confusion of the situation.
Media
Light novels
The series was announced by ASCII Media Works on September 5, 2022, and the first volume was published by ASCII Media Works under its Dengeki Bunko imprint on November 10, 2022. In a press release, Yen Press announced that it had licensed the series in English. The English version is translated by James Balzer, and the first volume was released on June 18, 2024.
Webtoon
A webtoon adaptation written by, illustrated by TOmoe, and produced by began serialization on 's HykeComic webtoon platform under the HxSTOON label on November 6, 2022, soon before the first light novel release. After the initial batch of chapters, it started a weekly serialization schedule, which moved to a biweekly schedule on January 7, 2024, and after multiple periods of hiatus in 2025 moved to a monthly schedule starting on December 7, 2025. Its chapters are being collected unscrolled in volumes by Media Factory under its imprint.
Anime
An anime television series adaptation was announced on December 2, 2025.