Death Arena of All Heavens

Three years ago, why did one third of humanity suddenly disappear? Is humanity running away from home en masse? Or did Thanos snap his fingers? Three years later, when someone tells you, You can find those people by participating in a game, Will you participate? The stakes of this game, It's not just about your life, It is also related to the lives of all people on the earth, This is a game of human life and death. And before that, what preparations will you make in the remaining time? Provide a letter from home? Or confess to the one you love? None, I saw a group of Pikachu staggering about to find Ash in Pokémon; There is also a group of Batman ready to come to protect Gotham City; There are countless gourd boys shouting slogans to save grandpa together...