This is a continuation of the series after Season 3, Episode 10. Yes, this is most likely an AU. If this isn't an AU, the great kings of the past have blessed this story.
This story will have KionxFuli moments in it.
Kion and Rani are finally King and Queen of the Tree of Life and they hope for a great future. But then a visitor comes to the Tree of Life and she seems to like Kion as well. She tries everything to get Kion but then things... gets out of hand. Will Kion and Rani's love last forever or will it cease to exist? I do no own the Lion Guard.