I like to think that that part of Mami's sidestory was before Rika met Ren. Otherwise, Mami might need to be careful of a certain scythe-wielding magical girl the next time she's alone in Kamihama.
You know, I always felt like there was something between the two side character girls (glasses girl's friends) in Takagi-san. This makes it seem almost plausible that I wasn't imagining things...
I happened to walk by a live Locodol performance while I was in Japan. It was pretty surreal... but I couldn't help but think of these two characters. Nice to see more of them.
Who's to say they don't have cameras though. Especially given that Anna seems to be able to get her hands on almost anything imaginable assuming she's given enough money.