Digital Artbook for Yunyun Syndrome!? Rhythm Psychosis (PDF file).
Right-click Yunyun Syndrome!? Rhythm Psychosis in your Steam Library and select Properties.
In the DLC tab of the Properties window, confirm that the artbook DLC is installed.
Right-click Yunyun Syndrome!? Rhythm Psychosis in your Steam Library and click
Manage → Browse Local Files.
File Explorer will open.
Open the Digital Artbook folder to view the artbook PDF file.
