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?
But I talked with Erisa-chan's 
mom a while ago,
aber kurz vor ihrem Verschwinden
habe ich von ihrer Mutter gehört,
Pero cuando hablé
con la mamá de Elisa hace poco,
Pero cuando hablé
con la madre de Elisa hace poco,
Quand j’ai vu sa mère,
je lui ai demandé.
però un po' di tempo fa ho parlato
con la madre di Elisa
Mas um tempo atrás eu conversei com
a mãe da Erisa-chan, e ela disse que...
Но когда я пришла
к маме Эрисы, она сказала,