Great Demon God of Another World

After transmigrating from the modern world to another realm, he begins an incredible journey there, leveling up, slaying monsters, and surrounded by beauties. The day he masters the Great Book of Bliss will be the day he becomes the Great Demon God of Desire. Billions of slaves will prostrate themselves at his feet, and he will be accompanied by a harem of concubines. Cultivation is supposed to sever the seven emotions and six desires, but he goes against the grain and takes them to their utmost, becoming the person who understands humanity best in the entire universe. Ask the heavens: who is God, and who is the Devil?