Savior Of The Four Races

After saving Akeno from being killed by her clan, Naruto gets taken to the underworld to meet Lord Gremory. Upon finding out a special gift Naruto has, Lord Gremory takes him under the Gremory name. Later settling a dispute within the underworld, Naruto comes back to face a new challenge that threatens not only Earth but Heaven and Hell itself. Godlike! Harem! Rinnegan fic! MA