Luna and Artemis used to think of themselves as friends. Or so Luna thought, but Artemis didn't feel that way. In Sailor Moon R The Movie, Artemis was sad when he thought that Luna might love someone else, but Serena didn't even know that Artemis had been crushing on her the whole time until the end of the movie! :) It's such a sweet movie. Even while Luna wanted to be a human, Artemis loved her. She did turn human though...

Artemis and Luna fell in love, and now there is a very funny story to tell, my friends.

Artemis and Luna got into a huge fight when this little kitty came from the future. Her name was Diana, and Luna thought that Artemis had her with a nun. Yes, a nun that Artemis had watched everyday (he was really watching the church to see where Luna and he could get married.) So, Artemis didn't even know this kitten. They gathered around her, and Diana ran up to Chibi Usa saying "Small Lady!" That's right, the new kitty to sit on her head (note: Luna P was gone!) So, that's when they explained everything.