Ali Project
Demon collaborated with Arika Takarano (Ali Project) for the May 13, 2020 single , which is the opening theme of the anime adaptation of "The 8th Son? Are You Kidding Me?". That same year, he provided the song "Naked Men Miro, Hadaka no Oretachi o!" to the stage adaptation of Reiko Okano's sumo manga series "Ryōgoku Hananishiki Tōshi".