Ranko's friend might be a lesbian, that's mostly or sometimes the case when the female mc has a friend who doesn't like the male mc. Like the one from Fuufu Ijou, Koibito Miman... Well idk might be wrong
I don't know what I hate more, characters like Ranko's noisy friend (they seem to be a prerequisite for nearly every story of this sort) or that whenever they show up everyone else turns into a retard that just allow themselves to be walked all over.