Purgatory of a Regressor

Arata has spent his whole life on death's door. Born with a weak heart, he has to rely on his brother, Ren, to keep funding his medical bills. Yet, Arata never recovered. Once his heart stopped, he was sent to another world. There, he finds himself in a higher plane known as the theater, alongside the theater's Dramaturge, Ravenna. Arata was chosen by a higher power to save the world of Tibil. Tibil is a world predestined to end due to calamity. Arata must find the path to saving the world. In completing his task, he can return home.