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?
that they've actually been 
switched out with someone else.
.أنّها بُدلّت بشخص آخر
ist doch klar, dass die dann
mit jemand anderem vertauscht wurde.
es seguro que lo cambiaran
con otra persona.
es normal confundirlo con otra persona.
lo scambio di identità è un classico.
você pode trocá-lo por outra pessoa.