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 the men turns into zombies who are very lustful and the women of the world are not zombies if a woman is raped by the zombies they die

One more detail is the the zombie's sperm has no chromosomes and he is the only man left. Women pregnant with a boy before this virus have the baby also infected in the womb and give birth to a zombie child