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?
And the reason the first three solutions 
were rejected was also because of them.
.وسبب رفض الحلول الثلاثة الأولى هو أيضًا
Deshalb wurden ihre ersten
drei Lösungen abgelehnt.
E anche la confutazione
delle tre soluzioni era una cosa voluta.
E as três primeiras soluções foram
rejeitadas por causa da assassina.
И то, что три прошлых решения отвергли —
задумка злодея!