What should have been a simple day out with friends turns into a mysterious disaster when powerful demonic beasts appear. Kazuya and Atsuro were supposed to meet Naoya, their enigmatic friend, but he doesn't show up and instead sends another friend, Yuzu, to meet them and give them specially modded gaming devices. It becomes apparent that Naoya has given them much more than they bargained for when demons spawn from these devices!
Things are going from bad to worse in the lockdown. Not only have Keisuke and Kaido gone rogue, but civilians are starting to revolt. Some demon tamers stage an assault against the SelfDefense Force in an attempt to escape, but learn that Japan’s government is receiving aid from a higher power…