@aranicar It was a doujin about Oriko. And the one who killed Mami was Oriko's underling Kure Kirika. Here's the link: https://dynasty-scans.com/chapters/girls_and_the_end_of_the_world . In the original spin off, Oriko was so strong that all It toke was one mean look from her to make Mami cry and fall on her knees and Kirika completely kicked Mami's ass before being caught in a trap set by the later. I wish I could see more of Oriko and Kirika. They were a badass duo.
Also... there is a doujin here where a new Magical girl that can see the future defeats and kills Mami. She`s defeated by Homura in the end. Does anyone know this doujin?
Nope. No. Não. Huge negatory on this one. I'm out bro. See you all. There is the first bestiality tag on Dynasty Scans just a few images above and now this? I'll come back when there are less weird things around. Peace!