We can pretty much cover healing Kyousuke as something that's pretty much at the top of our to-do list, but that since none of the girls in Mitakihara are specialized healers, it'll take some time to fully heal. Given how extensive the damage was, it could take multiple hours-long sessions to heal.
So, in short: we'll at least start the process today or tomorrow, and it might take a few days in total, but we'll get it done for sure, and soon.
That should reassure Sayaka and Hitomi more than enough.
We should also be sure to cover just how difficult it makes a girl's life to contract, even if they aren't killed throughout the daily dangers of the forced lifestyle. Things like really hurting your social life, interfering with work/careers, a need to be
constantly on top of your soul gem's status and the eternal risk/reward balance for hunting for Grief Seeds--some form into groups and are far better off for it, but it's still quite dangerous. It's a decision you can never take back, and it will force you to prioritize it above all else, at all times.
We might not have to go that far, but if it seems like Sayaka isn't taking it as seriously as she should, then...
"Insanity, then death" seems workable if this question pops up for anyone.
Pretty much. After explaining/learning that Soul Gems literally contain an MG's soul, the idea that said MG would die if the gem gets fully depleted should be a logical extrapolation.
As for the insanity part, there's a bunch of ways to interpret that that aren't dangerous. You could easily compare it to someone who goes too long without drinking any water--they become irrational, desperate, and eventually insane. Or, if going by the corruption wording, then a person's soul gem getting more corrupted would make sense as a cause of increasing insanity.
Of course, using the word 'corruption' is a very dangerous practice to begin with, considering how it's an easy logical step to go from "soul gems literally contain your soul" and "soul gems get more corrupted over time" to "oh hey Grief Seeds look a lot like Soul Gems and are made out of the exact same stuff Sabrina pulls out of our soul gems, a.k.a. 'corruption', and when your soul gem gets fully corrupted you go insane and die. That seems kinda connected..."
Mami
might be a bit safer from that risk because she would deliberately cut off that line of thought and avoid it like the plague for as long as possible. She would probably
figure (though not consciously) that it was true, but she would very much avoid
confirming it, so as to live with the possibility that it
isn't true.