Illusion games questions

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Hello, everyone. I have a few questions regarding the Fakku! releases of Illusion games.

* How moddable are the Fakku! releases of Honey Select Unlimited and Koikatsu Party?
I hear these create-a-character games typically require some amount of modding to be considered "playable", and I know the Steam versions have a lot of mod support.
Do the Fakku! versions of these games have whatever is considered the "essential" mods?
Also, if there is some mod support for these Fakku! versions, then will I run into any bugs or issues if I only have the base game?
For example, will I be limited in which user character cards I can use if I do not purchase the expansion of Honey Select Unlimited?
For example, since the After Party DLC was never released on Fakku! for Koikatsu Party, then will I only have limited mod support for this version?

* How is the VR functionality for the Fakku! releases of Honey Select Unlimited and Koikatsu Party?
Regarding Honey Select Unlimited, it seems that it has a good fan-made VR mod that makes the entire game playable in VR.
For anyone who has tried it, is VR in Honey Select Unlimited well done?
Regarding Koikatsu Party, I know Steam has the official VR add-on for it, and I hear there is an even better fan-made VR mod for it as well.
Are either of these VR options available for the Fakku! version of Koikatsu Party?

* What are the approximate storage requirements for Honey Select Unlimited and Koikatsu Party?
Related to my first question, I know the inclusion of mods will increase the file size for both games.
I am not one for massive amounts of mod, just whatever is considered "essential" for the games to be "playable".
I would like to hear what everyone's file sizes are for these games; I hope it is around 50 GBs or so for each of them.

* Is there some kind of story or campaign mode for Honey Select Unlimited and Koikatsu Party?
I have never been very interested in create-a-characters or level-builders, so I may only try creating a few characters.
Are there some set characters in each game with their respective routes that I can interact with or have a sense of progression?

Thanks in advance for any amount of answers you guys can provide.