ok, since none else posted and the chapter is up at the "usual" place, here's what happened:
Spoiler for FINAL CHAPTER!!!:
Kazumi transforms into a new magical girl and somehow (yes, they don't explain how) she "upgrades" Umika and Kaoru. Kazumi says Fake nico and her are pretty much the same, since they were both created and that she understands what fake nico is going through, that she feels cheated and stuff. Fake nico says she doesn't care since she's turning into a witch anyways, so she's gonna use the power she has to destroy the world because Kazumi rejected her hand
Fight scene (short one) and Fake nico (and the witch) is defeated, Kazumi then gives her a lecture about how Nico wanted her to live happily and that Nico was somewhat jealous of what Fake Nico had (a normal life with family and friends), Kazumi then bows to protect all the people she loves. Kazumi also comments that the witch they killed didn't drop a grief seed (AGAIN!??? wha the hell) and that she already used Michiru's one for her wish, so he can't save her.
Fake nico says it's all right and thanks Kazumi, she then jumps off the building and explodes midair (woah). After that, we are warped to the school, someone says a very lame joke I personally didn't like lol, then Kazumi is introduced by the teacher, she calls herself "Kazumi Subaru" (Subaru means Pleadies in Japanese btw).
Then Kyuubei is talking to Umika and Kaoru. Kaoru tells kyuubei that he must be happy that their plan didn't work to what Kyuubei responds that he doesn't feel anyways (lol, trolled). Umika is gonna write a book called "Innocent Malice". Kyuubei asks if they are going to search for another alternate method, Kaoru says that for now she wouldn't like to do that, but Umika says that they will not give up in looking for a way to turn witches back into humans and that they'll live every single fiber of their lives. Kazumi then appears and the three of them transform into magical girls aaaaaand...the end.