Kotoko arrived in Makurazaka City to take care of the incidents with Steel Lady Nanase and happens to run into Saki, who had become a police officer. Saki decides to research Nanase Karin a bit more and learns that the former idol had died a mysterious death. In order to defeat Steel Lady Nanase, they would need more details, but...
So what was the sequence of events 
that led to Nanase Karin's death
ما هو إذًا تسلسل الأحداث الذي أدّى إلى موت ناناسي كارين
Welche Umstände haben also
zu dem Tod von Nanase Karin geführt
Dans quelles circonstances
Karin Nanase mourut-elle
E comunque,
Então, qual foi a sequência de eventos
que levou à morte de Karin Nanase
Да и вообще, смерть Карин Нанасэ,
которая породила Стальную деву…