Amano plays hardball.
He unmasks Eleventh, revealed to be the Mayor. He allies with Eighth to take out Eleventh, then double crosses her.
But right as their victory seems assured, Akise and Ninth arrive. They found three bodies buried under Gasai's house: her parents, and her.
This Gasai is an impostor.
Amano doesn't care.
--
Eleventh hooks up Eighth's diary to a supercomputer and gives everyone in the city an account: his plan is to be the leader of a clairvoyant kingdom.
Nishijima rescues Ninth from Eleventh's men and proposes to her!