24 Jikan Kyousei Hatsujou - Kokumin Bitchi-ka Keikaku

In a society where discrimination between the upper and lower classes has become normalized and socially ingrained, the ruling elite employs a human-manipulation device to physically transform beautiful women into perpetual breeding partners in heat. Masayo, a young woman of remarkable beauty, is conscripted by the state to serve as a legally designated "Slut"—a sex slave assigned to an upper-class partner. Enraged by her forced conscription, Oda, Masayo's childhood friend, teams up with his ally Hachinan to acquire the "Z-System," a nanomachine-based device capable of controlling human beings at will. With this weapon, Oda vows to exact revenge on the arrogant yet cowardly upper class. His targets: the women of the elite. Alongside Hachinan, Oda manipulates their actions, rewrites their memories, and violates their bodies until they are impregnated.