Ashes of Dust: Immortals and Demons Meet by Mistake in Different Ways

I was originally a demon princess. I secretly came down to earth for fun and accidentally saved the life of the heavenly prince who had gone through calamity. We fell in love with him and stayed together for the rest of our lives. When he returned from calamity and returned to heaven, he blamed me for interfering and caused him to suffer fifty more years in the mortal world. He hated me to the bone.