The people who have actually come are not Child Diary users, but Seventh: Ai and Mar are lovers whose paired Love Diaries tell them how to protect each other. (They are both Seventh.)
They see this as a lover's duel: which couple's love is strongest?
It's Seventh.
Eighth's diary is a server: anyone who runs a blog on it gets the effect. She sends some of her users to take out Amano.
The defense plan is: if they cut cell service to the area, Eighth's Child Diaries will stop working, and they can take them out.
But it's a fakeout.
Gasai has gone a whole new level of cuckoo bananas. She has taken over an old hotel and has Amano prisoner, as well as all the others.
But Kousaka (Amano's friend) suddenly gets upgraded to an Apprentice Diary Keeper. He busts everyone out.
How? Eighth has the ability to share.
Amano and Gasai disappear.
Detective Nishijima inherits Fourth's case files. He learns about the diary holders.
He and Akise work out a plan to have their high school friends search for them, figuring they'll run if the police do the search.
They all get captured.
Fourth comes for them, but Ninth arranges things so the other cops see what he's up to and arrest him. His diary shows what happens on his cases, so it's useless now.
He asks Ninth for one final favor, and pays with his life, destroying his own diary.
Fourth "interrogates" Amano by playing Russian roulette. Gasai steals an officer's gun and breaks him out. They go on the lam.
While hiding, they meet up with Ninth, who explains: Fourth's son is dying and now he wants to win.
They all have Dead Ends in their diaries now.
We get a flashback of Ninth's backstory.
Akise sets Amano and Gasai up on a date. Would Amano fall for Gasai if he didn't know about the bodies?
Akise snoops around. But Gasai has disposed of the bodies.
Fourth sets Amano and Gasai up to take the fall for Tenth's murder.
Gasai has Hinata at knifepoint. She's far more concerned that she will steal Amano than about the current situation.
Amano makes her back down with the only thing he has to offer: officially acknowledging her as his girlfriend.
Fourth finds Tenth and kills him.
Hinata is Tenth's daughter and has his diary. She takes Amano's diary at knifepoint.
Aru Akise, another classmate, fakes having a diary and engages Hinata in a high stakes bet. Can he beat future information? Yes. Lying to Amano puts false information in the diary.
Tenth asks Deus if he can transfer his diary. What is his plan?
Amano and Gasai transfer to a new school. Amano makes fast friends with Hinata.
She suggests they should totally check out the site of a gruesome murder!
It is a trap. She knows about the diaries.
Fifth, Houjou Reisuke, begins his campaign of revenge against Amano and Gasai.
Amano tries to find his diary. Gasai takes a more direct route.
When he unleashes poison gas, Gasai becomes as interested in the antidote as the victory.
Luckily, stabbing gets her both.
The official report is that the deaths are from a mass suicide at the cult.
Gasai breaks in to cook dinner for the whole family. Amano's Mom likes her.
One of Mom's coworkers was in the cult and died. She'll be looking after their son for a few days.
The son is a diary user.
Gasai pushes Amano out of harms way, but Sixth orders her cultists to gang-rape her while broadcasting it over the loudspeaker to draw him back out.
Even though Gasai is crazy, Amano won't stand for this, and he kills Sixth by darting her diary.
Obviously, because the bad guys are after Sixth. This isn't her threat.
Twelfth, Hirasaka Yomotsu, is insane. He thinks he is a super hero.
Gasai dispatches him.
But it's a double cross! With Twelfth gone, the cult is un-hypnotised, and Sixth turns on them.