This assumes that Iwabuchi is using a double of Rika to a specific end.
The only one that makes sense, is Sousuke. And given you bring up connections to Shingo and the like that would have been in place well before Sousuke got even a whiff of what his wife was doing, that means all of what you listed has been planned ahead of even the beginning of this manga.
So does that make Iwabuchi the Big Bad? He's using Rika, the woman he liked, to try and break her husband out of some atte.pt at revenge, but is using a double because Rika wouldn't go through with actuallt fucking another man in front of Sousuke?
But she would do everything else, including selling the idea of being fucked in front of Sousuke, to satisfy Iwabuchi's plan?
Why would she go along with any of it, then? Maybe I need to go back and read your comments explaining the "Ultimate Love" thing, but it really feels like this would necessitate Sousuke finding out about Rika's secrets and then pursuing her, and there's no guarantee that all the choices and actions he took would play out as they did in order for him to end up at an orgy party were Fake Rika happens to get gangraped.
That's just too many moving pieces, to involve a double from that far back, wherein even the cheating website business was a part of the Double Rika ruse.
Again, maybe I misread/misinterpreted something, but that is way more convoluted than it has to be, I think.
Oh, i was conjecturing over Mukola9191's idea of a body double, nothing too big at this time, haha.
Trying to fit this "theory of a body double" in a scenario where it could work ONLY with what we have now.
The main point was that, while Iwabuchi was "breaking" Akito's sister, Rika was to promote the girl by using Momonga. Shiratori said she wasn't the type to have sex so casually with other people, but if this was a job for Iwabuchi, then Rika having sex with Shingo was no problem. But all this comes from a possibility of a body double AND some points:
1 - IF what Rika did to Misato is some sort of
Modus Operandi to her, then there's a chance she might've done the same with Shingo, when his usefulness was fulfilled, Momonga was no longer needed, but he could've been blackmailed later to do some jobs;
2 - Rika does not, in fact, dislike doing these jobs for Iwabuchi. Accomplices, as it is. She enjoys sex, but also enjoy seeing people being put into misery( just like with Misato). But,
- her dealings with Shiratori and Matsuo Jin indicates that HER dealings dot involve, or need, it;
- When talking with her in the car, saying she was his biggest breadwinners, the way Iwabuchi lips distorced may indicate that she IS leaving him, and wants to deal her with things herself;
3 - As we've been hitting here and now, Suguru Terauchi is still on the scene. If not for him appearing and pointing Sousuke specifically torwards Momonga, Sousuke would've never found out about any of Rika's dealing, remaining ignorant. So i've been assuming, as of while, that the dramatic irony of this story is how people think of Sousuke from Rika's shared information( Misato and Iwabuchi) or from shortcomings( Shingo with the SD card), instead of knowing him from what WE, the readers, saw.
Trying to break Sousuke using a body double would be ONLY after she found out HE found out of her and Momonga. Because both the orgy party breaking, and Misato's video with him could only work if Sousuke idolized Rika( what he was doing until Shingo's monologue), basically "old" sousuke to us. The sidetrap is, while still naive, he's "new" Sousuke now, so not despairing so much over her persona.
As for Rika's "ultimate" love, i do have a theory about it, but it can only work if point 1 is valid. From then on, i guess what's making sense with her missing piece might be easier found the we think.
