The new series is entitled KADO: The Right Answer – Blue Spring and Railgun, and it features artwork by Kouki Ochiai.
The story begins after Episode 05 of the KADO: The Right Answer TV anime, and it focuses on a pair of high school students whose lives are irrevocably changed by the appearance of Yaha-kui zaShunina and the “KADO” cube.
A strange being called Yaha-kui zaShunina appears from within Kado and tries to make contact with humanity.