On another night at the Azusagawa residence, Futaba Rio lends Sakuta some insight into how her separation into two different Futabas took place: it was the result of her inability to reconcile her need for attention with her inability to forgive the means of getting that attention.
Futaba developed faster than the other girls in her class—a lonely development, to be sure. It isolated her; made her feel alone, conspicuous, even dirty. And yet, her need to not be alone led her to start the photo stream; any reactions, no matter who from, were a consolation; they made her feel a little less lonely.
This debunks my theory about the competing sides of her psyche splitting off, but only partially: you could still say the Futaba living at Sakuta’s is the one more like the superego, while the one living in Futaba’s house is more like the id. One can live in an imperfect world far easier than the other.
While accepting the judgment of Mai’s manager that she cut out most private meetings with her boyfriend as a “strategic retreat” for the sake of her just-restarted career, Sakuta digs fully into this Futaba Dilemma. After all, he’s dealing with a childhood friend.
“Shut-in” Futaba wants “Wild” Futaba to shut down the account, and while meeting with her she shows him pictures from when she was in middle school; a form of “self-mutilation” in which she intentionally posted pics of her developing form. Both Futabas say they “hate” themselves.
After a day when “Wild” Futaba gets to fan a hot Kunimi, she starts to get unwanted propositions and threats to expose her from strangers looking at her pics online. This naturally freaks Futaba out, and she deletes her account, runs to her (huge!) house with Sakuta, and has him sleepover.
There, she reveals to Sakuta that she felt like she’d be all alone again after both Kunimi and Sakuta got themselves girlfriends. She already feels like Kunimi is so far away, but all it takes is one call from Sakuta on her phone for him to come running (well, biking) to her side in the middle of the night.
Unknown to Kunimi, Sakuta just proved what a loyal and dedicated friend he is. When she realizes she was never alone after all, she tears up, and Kunimi has Sakuta buy them both drinks to rehydrate: him for his biking, her for her tears.
Sakuta also buys fireworks and they go to the beach, lighting sparklers and candles and crackers and rockets until the night sky starts to brighten. Futaba smiles and laughs and the three old friends have the most fun they’ve had together in ages.
Futaba’s “separation” may have been unfortunate, but one could argue it was also necessary in order for her to be reminded of what she has, not to mention bring the three back together after some distance was created between them due to extenuating circumstances.
More importantly, “Wild” Futaba started the day wanting Sakuta to take a side—since “the world only needs one Futaba Rio”—and ending with her urging Sakuta to help the other Futaba. He heads home to report that the account is history, then passes out, leaving the other Futaba her phone.
The background shows “Wild” Futaba with Sakuta and Kunimi during their idyllic evening. When Sakuta wakes up, she’s gone, but the other Futaba tells him “if it were her” where she’d be: the school, in their classroom.
There, Futaba repeats the other Futaba’s words about there only needing to be one of them in the world, and how the “Wild” one is clearly being “the better Futaba”, and that she should just disappear. Sakuta rejects all of that, an invites her to the fireworks festival he, Kunimi, and the other Futaba agreed to attend (since he and Mai can’t date and Kunimi is having a fight with his GF).
He leaves it at that…then passes out a product of his bike ride in the pounding rain being a bit too much exertion immediately following an all-nighter. He wakes up in the hospital with Mai by his bedside, having been called by Futaba.
By being there for Sakuta, Futaba proved that she actually is needed. And when Sakuta sits with her later, he neither tries to tell her all of her positive qualities nor tells her how she needs to start gradually liking or loving herself, as a friend might be expected to do.
It’s because Sakuta is “the worst” in this way, not saying what a usual friend would say, Futaba is relieved and comforted. She then calls the other Futaba on a pay phone, voices her desire to go to the festival, and in a neat trick where the phone receiver suddenly falls, she disappears. But she’s not gone. Futaba Rio is simply whole again.
Whole, and no longer alone. While watching the fireworks at the festival, she seems to tell Kunimi her feelings, but rather than seeking an answer she already knows, she simply urges him to make up with his girlfriend.