Listed as Episode 0 and aired together with episode 1; however, it is a recap of Chaos;Head with some tweaks.

Shibuya, 2015. In a city recovering from the "Shibuya Earthquake" which devastated it six years ago, Takuru Miyashiro, a student at the newly built private high school "Hekiho Academy" investigates a series of serial killings known as "The Return of the New Generation Madness" as part of his work for the school's newspaper club...

Shibuya, 2015. In a city recovering from the "Shibuya Earthquake" which devastated it six years ago, Takuru Miyashiro, a student at the newly built private high school "Hekiho Academy" investigates a series of serial killings known as "The Return of the New Generation Madness" as part of his work for the school's newspaper club...