Yah that seems reasonable, it also opens up a semi-random factor to the story. Like Daiya and Yasuho's mind are hung up on how babyish diapers are, so once King bed activates for a second time, it takes a sort of babyish memory from Yasuho like, her first few steps, or her younger self learning colors, or her first few words. Just something that leads to Yashuho becoming more babyish, if were ready wanna start off the RP?

I think stuff like that will definitely cause some anger from her, but at the same time I think she'll probably not to show it.
Oh also technically speaking California King Bed steals a random memory, but how I like to treat it in RP's is it steals a memory that relates to something currently on the effected persons mind. For instance she's thinking about Daiyas lack of bladder control and she'd forgot her potty training.
That kinda how it works in the manga, but considering how few memories Josuke has at the time, you can reasonably say it was still random, I just think this works better and makes things smoother

Makes sense, it could also make Diaya a bit angry to find out that Yashuho was originally going to visit Josuke, or maybe she feels that Yasuho is just trying to belittle her cause she gets to hang out alot with Josuke. I really am real thankful for you taking the time out to like discuss an RP with me, real hyped to see how it turns out

I'm thinking Yasuho comes over to visit Josuke, he's not home and she sees Diaya on the couch watching TV, in a visible wet diaper. She would have heard about how Daiya could see fully again and how she was also in diapers now. Daiya is perfectly fine with this, where as Yasuho would probably feel bad for her, thus offering to help and looking down on her a little.

Ok the sounds like a plan in terms of plot and setting, want Daiya to call Yasuho over to discuss her little diaper issue or something along that lines? Sorry, But just want to be clear on the whole Dote and California King Bed stuff, you want Yasuho to help out Daiya and thus that give Daiya the trigger to activate King Bed?

Also I haven't fully clarified, but Daiya only doesn't have Control over her bladder in this situation, she'll probably on rare occasions mess herself from simple lazyness, the same reason she stays in wet diapers a little to long.
I figure Yasuho will end up messing herself without realizing it after she looses her potty training and we can have a fun scene where she thinks Daiya messed herself, only to realize it was her. Then Daiya will offer to diaper her up.
As for when I think it can safely be a bit after, that was Daiya is more upset over Yasuho having won Josuke, while mostly being over it so she doesn't extremely dislike Yasuho. Only doing anything permanently bad to her when loosing her temper Instead of being out of Malice.

(sorry I always assumed it triggered when someone would "worry" instead of "dote", my bad on that translation mix up)
That sounds great man, Daiya is the one getting diapered and all, but shes still the one basically in control. We could even have a small little part where Diaya tries to use her stand on Kyo only to fail and bugging her a bit. I know it's a bit silly to ask but we doinf Daiya fresh from interacting with Josuke? Cause thats the real part where she's obsessed with him and all, I mean later on she just really devolves into a small crush

I feel like Daiya has to keep a somewhat neutral role where Yasuho will still try to treat her little, since California King Bed activates when someone dotes on her, really it's as simple as Yasuho offering a diaper change or really to help with anything. I mean realistically Diaya probably can't read Kanji, probably just Hiragana or Katakana depending on when she became practically blind. So there's plenty of stuff for Yasuho to dote on Diaya over
(For the record the official terminology used is "whenever someone dotes on her" so that's why I use it)
I feel like Kyo will probably be more strick and distance, making her immune to California King Bed since she's not doting on her. Where as Hato will be a little more vulnerable to some trickery and probably also act more like a big sister than a mommy.

Yah that whole chess piece being broken could really work out a way to continue babying Yashuho, maybe we could have Daiya threaten to not help Yashuho out, which would cause her to worry and maybe giving California to activate for some more fun.
You want to focus on Daiya and Yasuho's connection first for a few days or so? I really like the idea of having the 2 connect for a while, Before Kyo and Hato come on over. Do you want Hato and Kyo to do anything in particular or just broad mommy stuff

In general in Jojolion the family doesn't tend to use their Stands infront of each other so I don't think we ever need to really even act like Born this Way and Walking Heart even exist, past them allowing them to see other Stands.
And yes, I'll play Kyo and Daiya while you play Yasuho and Hato.
For the most part we'll just focus on Daiya and Yasuho at first, but maybe at some point have Yasuho head home, and do a little time skip to where Hato comes home and hears from Kyo that Daiya wasn't being responsible and changing her diaper when it needed to be. Then we can have a little baby punishment and the next day have Yasuho come back to Daiya for advice since she'd continued having accidents. Probably because dispite Daiya giving most her memories back she broke the chess piece with her potty training out if anger of Yasuho talking about spending time with Gappy or something like that.