Curing Incurable Disease With Semen ~I Was Wished for by the Unfortunate Beauties~ (Associated Names)

I have a little sister that is hospitalized because of an incurable disease But one day, by her request, we did sexual things. But since then, my little sister got better, and finally she completely recovered. Does doing ecchi things with me cure sicknesses? I was doubtful at first, but then I also had sex…