Demon's Crest

is a Japanese light novel series written by Reki Kawahara, with illustrations by Horiguchi Yukiko. The series began publication on November 10, 2022 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
"Onii-chan, this is reality!" Yuma Ashihara, a 6th grade student at Sekka Elementary School, stepped into the "New World", a fusion of game and reality, while playing the VRMMORPG "Actual Magic". The most beautiful girl in the class, Sumika Watamaki, appears before Yuma, who is confused and unable to comprehend the situation. But her appearance had changed tragically. It's something that can only be thought of as a "monster" in a game... "--This is a game, and it's reality." Following VR (virtual reality) and AR (augmented reality), Reki Kawahara's latest work is set in MR (mixed reality) & death game!