Tasuuketsu

Saneatsu Narita finds himself in a game of survival as half of the human population disappears each night!
The game began suddenly. It was "Tasuketsu", a brutal survival game in which the majority is eliminated. In order to fight back against the immensely powerful emperor masterminding the game, young men and women create their own futures using the mysterious special ability known as "Special Right."
(Source: Crunchyroll, edited)