Twitter user DistantValhalla has translated some important segments from the scans, which can be found here.

Notably, DaSH will take place half a year after the events of Robotics;Notes. During Tanegashima’s preparations for a summer festival, and JAXA’s preparations for a space mission, Nae Tennouji returns to Tanegashima alongside Itaru Hashida. In the midst of all this, it appears that the antagonist of Robotics;Notes, Kou Kimijima, will be returning in some form.

As shown by the fourth scan, it seems that this time around the path which the player takes in the story will be decided by a new trigger system, titled the “Deluoode Map System”. Additionally, it looks like DaSH will introduce a new female character, though her name or role in the story is not known yet.