Return of the Blessed Curse

The world is at complete peace. No one starves or dies and all are happy thanks to the Light. Adler, the brother of the king of the world, lives happily with his friends and family until his mind is opened to the truth. The Sufferer blesses him with pain and the responsibility of saving the world, but can he do it when doing the right thing means being against everyone he's loved and ruining the eternal happiness of the world?