The entry page of Nathalie Daoust’s Hotel Story tells us that “None of the images were created or enhanced digitally.” We can speculate why this is deemed to be important - would the images be less interesting or good if they were the result of snazzy Photoshop work? In any case, the imagery is quite interesting, albeit at times a tad kitschy. Also see this page for “Tokyo Girls” and this page for a summary of the Hotel series with thumbnails.
(thanks, Ron!)