World's End Harem (2022)

S1E1 World of Women

Mizuhara Reito is just an average teenager who suddenly finds himself in a bizarre world populated by 5 billion women and only 5 men. Faced with the monumental task of ensuring humanity's survival, he must find a way to repopulate the species. However, as he navigates this new reality, can he remain faithful to his childhood friend who has gone missing, despite the pressure to connect intimately with countless girls?