Kotoko came up with three solutions, but they all got shot down. Kuro keeps trying to grasp the future where they can defeat Steel Lady Nanase, but Rikka made it disappear once again. But Kotoko wasn’t done yet. Steel Lady Nanase is not a ghost. What is Kotoko’s 4th solution that may finally put an end to Steel Lady Nanase’s existence once and for all?
All of my solutions were intended 
to erase Steel Lady Nanase,
،كانت النية من كلّ حلولي هي محو سيدة الفولاذ ناناسي
Denn wenn die Leute zu dem Schluss gekommen wären,
dass es den Geist gar nicht gibt,
Todas mis soluciones buscaban
borrar a la Dama de Acero
Todas mis soluciones buscaban
borrar a la Dama de Acero
En niant l’existence
du fantôme de Karin,
Ogni mia soluzione cancella Nanase d'Acciaio.
Todas as minhas soluções para
apagar a Mulher de Aço Nanase
Всё потому, что все они
отрицали существование призрака.