i remember a manga where the mc had a girlfriend who got raped and died and the mc killed the rapist and in turn got the death sentence by the country

After death he got transported to another world where there is zombie men who are very lustful and the women of the world are not zombies

One more detail is the the zombie's sperm has no chromosomes

https://www.mangaupdates.com/series/37vdez2/kyosei-tensei

Thanks