Installation:

After installed, the DLC will be downloaded in your local folder.
Check the game library, right click "The Other: Airi's Adventure", click "properties" and find the "local files".
It's in the folder "Airi's Adventure Art Book EN".

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This Art Book includes everything about "Airi's Adventure" and its development.
It is an A4 sized ebook (a pdf file) with about 100 pages (50 double pages). In this art book you will find:

Detailed information about the characters, environments and the whole story

Doodles and sketches during the development

New illustrations

Comments from the developer

Thank you for supporting this project!