Half a year after the events of ROBOTICS;NOTES ELITE, Kaito Yashio is introduced to Itaru Hashida through Nae Tennouji. Unsettling incidents start occurring all around them, harbingers of an event that will again plunge the world into chaos.

Half a year after the events of ROBOTICS;NOTES ELITE, Kaito Yashio is introduced to Itaru Hashida through Nae Tennouji. Unsettling incidents start occurring all around them, harbingers of an event that will again plunge the world into chaos.