Bishoujo Senshi Sailor Moon R: The Movie

During a peaceful visit to a botanical garden, Mamoru encounters Fiore, an alien boy he befriended during a lonely period of his childhood. Long ago, Mamoru gave him a rose before they parted, and Fiore promised that one day he would return with flowers of his own. Now that promise has brought him back to Earth, but he is no longer alone.

Fiore has fallen under the influence of the parasitic Xenian Flower, which feeds on vulnerable hearts and plans to drain the planet of life. Convinced that Usagi stole Mamoru's affection, Fiore takes him away and unleashes deadly flowers across Earth, forcing Sailor Moon and the other Sailor Guardians to confront a bond twisted by isolation, jealousy, and a promise that endured too long.