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 though our third 
solution was just rejected,
،رغم رفض الحلّ الثالث
Auch wenn unsere dritte Lösung
gerade abgelehnt wurde,
Aunque rechazaran la tercera solución,
Aunque rechazacen la tercera solución,
Le coupable de la troisième version
a été recalé,
La figura dell'assassino
della terza soluzione è stata rifiutata,
Mesmo que rejeitem nossa terceira solução
e o retrato do assassino que veio dela,
Даже в последнем из вариантов