After having escaped nearly being trapped in a virtual reality, Shido is afflicted by a strange feeling. A disturbance in the world in which he lives. Someone is out there... He cannot shake the helpless, uncomfortable feeling. This strange feeling persists... A new paradise. A girl who has the same last name as Rinne─ Rio Sonogami. For the sake of everyone's happiness, they wander in search of "the most important thing.