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?
The whole point of the case 
was for me to solve it!
فقد كانت الغاية كلّها من القضيّة هي أن أحلّها
Du wurdest nur geboren,
damit ich die diese Fälle lösen konnte!
Ils étaient faits
pour que je puisse les résoudre !
Dopotutto il caso è stato architettato
perché io lo risolvessi!
O caso existia principalmente
 para que eu o resolvesse!