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?
I still can't ask you to 
wait for five years...
Ich kann ihr einfach nicht sagen,
dass sie fünf Jahre lang auf mich warten soll.
No puedo pedirte
que me esperes cinco años…
No puedo pedirte
que me esperes cinco años…
Je ne peux pas lui dire
de m’attendre pendant cinq ans.
Non posso certo chiederti
di aspettarmi per cinque anni.
Mesmo assim, não posso pedir
que me espere por cinco anos.
Я же не могу просить тебя ждать пять лет.