Here is an overview of the story, via the official website:
A night spent with everyone, uneventfully and as always. Shido has a strange dream. In the darkness, he hears someone’s voice.
When he wakes up in the morning, he sees an unknown box with a picture of a snake placed at his bedside.
Wondering whether this is somebody’s joke, Shido checks with everyone. Then when he opens the box—.
Date A Live: Ren Dystopia is due out for PlayStation 4 this summer in Japan for 7,776 yen at retail and 6,912 yen via download. A 9,936 yen limited edition will also be available.