Mizuhara Reito is an ordinary boy who wakes up in a world of 5 billion women and 5 men. Now it's up to him to repopulate the human species. Can he stay loyal to his missing childhood friend when all humankind is counting on him to sleep with as many girls as possible?
Isn't there a possibility that 
if you use the semen of men
Wenn Sie das Sperma der Männer verwenden würden,
die gegen das MK-Virus immun sind,
¿No existe la posibilidad
de que funcione si se utiliza
¿No existe la posibilidad
de que funcione si se utiliza
Ça pourrait fonctionner
en utilisant nos spermatozoïdes,
Ma se invece usaste il seme
 di qualcuno immune, come noi,
E não seria possível usar o sêmen
dos homens imunes ao vírus MK?
Так ведь можно использовать семя
мужчин, у которых есть иммунитет.