1. Oops: Accidentally released experiment, or unintended consequence
2. Gain: Made by or for those who stood to benefit (e.g. the new world leaders)
3. Hate: Misandry; no men = no wars, world peace, yay!
4. Control: Reduce men to a very manageable population, drop most women into vulnerable poverty.
5. Insanity: Watch the world burn, ahahaha!!!
It was like this lifetime series that was cut off short, I was watching. It's called The Lottery well basically people couldn't get pregnant and children that were 5-8 were treated like royalty. It had a really creepy setting. So there was this scientist trying to make a cure and in the end she stumbled on the fact that there was a doctor who gave a few men and women a cure to not be effected by the man made virus that was started by the president in order to prevent over population. Instead of just lessening the amount of births the virus made women worldwide infertile. Obviously the doctor was who created a small cure was killed so maybe the girl in this manga is either killed, imprisoned, tortured or put in a deep sleep because she figured out the truth. *sorry for it being long*
#2, sounds good. But #5, it's more on point. Or #6 knowing some men are under an induced sleep, man hater psycho, planed to eliminate the rest of them for #3 or #4 to happen! Σ(っ°Д °;)っ
So if it is a man made virus, why would they even risk to kill all the men and left only a short number of man. Those chosen ones are really lucky.