The title and preview image for Akira Amano's upcoming 22-page one-shot manga in Shueisha's Miracle Jump magazine were revealed. The one-shot titled "Warashibe Tantei Numashichirō" will be published in the magazine's 13th issue on February 26. Amano will also illustrate the cover of the issue. This is Amano's first new manga work after finishing Reborn! in Weekly Shonen Jump magazine last November.