The life of the great devil in the future

The demon king, who has lived for 3000 years and has just grown up, lost his body after being plotted by the cunning hostile immortal family. Fortunately, he left the small world and came to an alternative future world full of science and technology if you come, you will be at ease, so the demon king of the small world of cultivating immortality will cultivate self-cultivation and character and learn to be a man in the future