Return to the Earth and I Will Be the King

The God of War from the Nine Heavens returned to the earth. He was fed up with the life of killing and was ready to live an ordinary life to fulfill his dream of being an archaeologist that had been stranded due to an accident in the early years. However, how could the chosen one be given the gift of being ordinary, and then embark on a road to save cultural relics and ruins (quite willingly) while saving the world and becoming a king! (Reluctantly)