Here is the demo description, via the PlayStation Store:
The captivating tale of 2011’s award-winning Catherine returns in Catherine: Full Body—bigger and better than before. Improved visuals and gameplay, brand-new music, enhanced multiplayer options, and much more await in this enticing new package.
Catherine: Full Body is available now for PlayStation 4 and PS Vita in Japan, and is due out for PlayStation 4 on September 3 in the Americas and Europe.
Watch a new trailer below.