He saved the world, but failed to save himself. Cursed by the Demon King, he became a monster despised by thousands of people, and everyone forgot that he was the hero who saved the world. His partners passed away one after another. He couldn't bear this kind of life and wanted to die countless times. When he committed suicide again, he met his "light" that was familiar yet strange...
Concept: The protagonists overcame various difficulties and finally got together.