Sakuta has a dream that Mai reveals herself as the true identity of Touko Kirishima at a music festival held on April 1st. At the same time, several major social media platforms were being flooded with posts containing the hashtag #DREAMING, leading to platform crashes and access errors.
As the hashtag #DREAMING causes chaos among the public, Tomoe Koga tells Sakuta that she had a dream that Mai got into an accident, rendering her unconscious during an event where she was collaborating with the police for a public safety awareness.