I don't remember if it was in the manga, but in the anime they did not explain why the hell her organs were still intact, so it's nice that there's an explanation here
And thus she chose to be spared from the pain before getting the illness...She registered herself as an organ donor before she took her own life.Her organs should've already reached the patients waiting for a transplant.our Boss has precognition abilities too.To help those who are suffering from the illness right now.And that's the plain truth of the matter. You might not believe this precognition ability but...It's a "Stone of Salvation" that allows you to peacefully take your last breath once you touch it.Even though she fell all the way from the rooftop, her body remained intact thanks to the mysterious power of the stone.When I forsee a person's death, a stone will appear out of nowhere before them.Nah, believe it or not,She found out that in the near future, she would suffer from a disease and succumb to it.