The story is from ff.net. I got permission from MadHat886, who is the author of the story, to post "The Heir to the Throne" here on Wattpad. Here is the original link: https://www.fanfiction.net/s/3019574/1/The-Heir-of-the-Throne
Naruto not only finds out that his father was the 4th Hokage but his mother is from a royal house. Now he finds himself the only heir to the throne with an army of female ninjas behind him. NarutoXHarem.