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?
We've lost more than half our 
scientists and engineers.
Die Zahl der Wissenschaftler
und Ingenieure hat sich halbiert
Perdimos a la mitad
de nuestros científicos e ingenieros.
Perdimos a la mitad
de nuestros científicos e ingenieros.
La moitié des scientifiques
et ingénieurs ont disparu,
Metà dei nostri ingegneri e scienziati non ci sono più.
Perdemos mais da metade de
nossos cientistas e engenheiros.
Мы потеряли более половины учёных
и инженеров. Многие технологии утрачены.