I can understand the issue with MimiMix as it's literally step up with the MC wanting ears to be like her crush, but this is just a comedy with ecchi yuri in it, there is no real setup for Mei and Anna being the "main" couple beyond an almost rape scene (similar to MimiMix actually) nor does it have a romance tag.
Mei throughout has shown lust for cute girls in general, she is a god of lust after all.
I understand that Mei is a god of lust but since she had the collar now
That just stops her pheromones from making people around her horny as hell, pretty sure nothing to do with her own desires.