Namuamida Butsu Rendai Utena
The pain that everyone cannot escape when living: the living, old, sick, and death. The way to save it is through Buddhist enlightenment. At the end of a war, a prince who obtained the Buddhist enlightenment became the Shaka Nyorai and saved the world. Long time has passed since that, currently the latter age of decadence. Mara, the worry that once tried to destroy Shaka's enlightenment, has made a contract with the devil in order to seek revenge against Shaka.