KamiKatsu: Working for God in a Godless World - S01

Yukito Urabe believes the all-powerful god Mitama will come to save him, so he takes part in a ritual to become the new leader of his father's cult. But the boy drowns during the ritual, and he wishes to be reborn in a world without gods or religion. He wakes in a completely different world, one emptied of spirituality. There he meets a deviant girl named Aruaru, who shows him her village. His idyllic picture of this world's society does not last long, though: he witnesses a public group suicide and learns about the country's end-of-life system, in which the government can order any citizen to die at any moment. Soon after, Aruaru and her sister are forcibly taken away for execution, and Yukito rushes to rescue them, but to no avail. In desperation, he remembers his father's teachings and says a prayer for Mitama to save them. As if answering his call, a little girl descends from the sky and wipes out everyone who harmed Yukito and his friends. To his surprise, the girl introduces herself as Mitama.