Manga artist Nobuhiro Watsuki's current editor Shuntarō Kosuge announced in the 12th volume of the Jump Ryū booklet and DVD series on Thursday that Watsuki is working on a "secret" new work.

Watsuki is best known for his Rurouni Kenshin and Buso Renkin manga. He finished his Embalming - The Another Tale of Frankenstein manga—a collaboration with his wife Kaoru Kurosaki—in April 2015, and designed some of the main characters of the Endride anime and smartphone game project.