Moonlight
Gojo Satoru is dying. And no, it's not his fault this time.
The curse which is withering Satoru into an early grave is actually the product of his great, great, great, great, great, great, great grandfather, who had a couple of sons that refused to procreate. And what does a proud, powerful man do when his sons refuse to fuck, and there won't be another heir to the clan?
He curses his own bloodline, of course.
It's only natural that he forces them through some twisted form of sorcery to become uncontrollably, violently attracted to the person they're most genetically compatible with.
It's even better that the curse creates a permanent, unbreakable bond between the two unwilling lovers. That's right, it usually takes more than one fuck to make a baby-- so, why not force them to have twelve?
Satoru wished his ancestor would be resurrected from the grave, just so that he could kill him again. That is, before Satoru inevitably dies.
He's had a good run, he thinks. Now, all he has to do is make sure you don't find out that you can fuck him back to life and try to very stupidly save him from himself.
(here's a spoiler: you do).