DxD: Return Supreme King

Judai's adventures had matured him considerably. He had become a full-grown adult, burdened with immense responsibilities. As the vessel of a primal force that gave birth to the universe, he bore the weight of maintaining the balance over the darkness until his next reincarnation. Or so he had believed until the last moments of his life. Now he found himself thrust into an unfamiliar world, trying to live the life of an ordinary teenager... A Yu-gi-oh/DxD/Multi Crossover