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?
For the past several years, Japan and the 
rest of the world have been quite unstable.
Elisa !
Negli ultimi anni, sia il Giappone che il resto
del mondo sono stati piuttosto instabili.
Nos últimos anos, o Japão e o resto do mundo
têm estado bastante instáveis.
В последние годы состояние
Японии и других стран шаткое.