You haven't lived until you've seen Sailor Moon R: The Movie. IMO, the greatest anime film of all time. Sailor Moon R movie is about Love, Friendship and overcoming the impossible. Basic things to you, but in the SM universe, these elements matter more than anything in the world.
Here you feel the loneliness of Fiore, then the tension between him and Usagi. Fiore mentioning that Usagi doesn't know the pain of being lonely. The other Sailors then recall their lives before meeting Usagi, which is heartbreaking. Very powerful.