Nippon Ichi updated the official website of the PlayStation 4 / Vita version which release on September 7, 2017 in Japan. This will be the official port version of the 2016 January released PC ADV game and on the official website now you can try the DEMO version.
You can play with the demo from your PC and from your smartphone. You can try the beginning of the story and it is fully voiced. The DEMO is different a little bit than the original version since the full version comes with CERO Z rating (only 18 years old) so Nippon Ichi removed some scenes.