Well, a bit of news regarding Mai is that her agency is having issue with her having a boyfriend. Interesting since she isn't an idol. It is basically a take it how it comes situation.
Meanwhile, for Rio, the whole thing with the account stems from confidence issues. The idea of wanting friends, but not knowing how to go about it. Thus, since guys had a reaction from her body, she thought that was the way to go. Which is obviously wrong as that led her to hate her body. For girls their body can be a curse for them even if some girls might be jealous of them for being more "blessed". From what we know, both Sakuta & Kunimi are her only friends that we know. Both now having boyfriends leads to a legit fear in Rio that she will be alone. Of course, Kunimi & Sakuta are both simple-minded. They wouldn't let go of their friendship with her.
The Rio back home gets hit with confidence issues when she sees the photo of the other Rio with Sakuta & Kunimi. The fear of being replaced and being alone. Of course, Sakuta needed to try to help this Rio out to realize she wasn't alone as well. Though for her, she needed to push to want it and not wait for it to be given to her. Alongside of that also not overworrying about things she can't control. Life is not meant to be idea, but how you work with what you got is crucial. We see that with her on the phone that she wants to go to fireworks. Also, she even confessed to Kunimi, but everyone knew his answer to it.
While this was a good arc for Rio to get some self-confidence in herself and be able to go for things even with her fears. It still leads to confusion about how the situation got resolved. Prob my least favorite of the 3 arcs so far because of that.
