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?
Even if they reject the 
conclusions of each solution,
،حتّى وإن رفضوا الاستنتاجات من كل حلّ
Selbst wenn man die Schlussfolgerung
der Lösung ablehnte,
Aunque rechacen
las conclusiones de ambas,
Aunque rechacen
ambas conclusiones,
Même si ces thèses
n’ont pas convaincu,
Anche se le rispettive conclusioni vengono respinte,
Mesmo se cada uma das
conclusões for rejeitada,
Пусть сами решения и отмели,
но их детали никто не трогал.