Tasuuketsu

In the anime Tasuuketsu, the world is plunged into chaos when a sudden and brutal survival game begins. Each night, half of the global population vanishes without a trace. The protagonist, Saneatsu Narita, finds himself forced to participate in this merciless contest where the majority is systematically eliminated.

To survive and fight back against the omnipotent game master known as the Emperor, the remaining young participants must learn to wield a mysterious power called the Special Right. This anime explores themes of desperate cooperation, forging one's own destiny, and the raw struggle for survival against overwhelming odds, as these individuals battle to create a future from the ashes of a shattered world.