gonna be honest like I don't want to incite anyone but this story is so clearly just having fun that like, to argue about how and why certain characters are bad people if framed through the lens of real life morality seems kind of moot when the story itself literally only cares about how to facilitate sex scenes. Like there sure are stories where taking apart the morality and ethics on display can lead to incredibly thoughtful essays but this is not one of those stories. This one truly just wants to show you how Miyako is having hot lesbian sex with every hot woman in this college area.
If that was the only reason behind that manga, it'd have been simpler and less dividing to simply have Miyako deciding for herself to do that, or ask Nakano to set it up for her. Or at least have Nakano ask her if she wants to do it.
Instead, we have Nakano just setting everything behind Miyako's back and acting like a pimp. I wouldn't be surprised if she takes a commission or something, like an entry fee to that club she made (not saying she does, just that if that come up, I wouldn't be surprised). Working around that feeling would have took a couple pannels and a few lines at most.
On to the latest chapter, Asakura is the cutest and would rather see Miyako end up with her rather than Nakano. That face in the last pannel... <3