The final battle takes place in the Hikariwo theater, where Takuru is trapped in a sightless and soundless prison in his own mind. He'll need Onoe's help to break free, but after what he knows about her, can he bring himself to ask for it?
Takuru is forced to confront his own involvement in the case, and the secrets of his past. He was a neglected and abused child, who turned to an imaginary friend for support. This decision has terrible consequences during the Shibuya Earthquake.
Kurusu has tracked down the identity of the killer, and revealed her secret to Takuru. Now she goes to the school to meet with the one behind all the murders.