Leaving for New York City to study abroad in America, Mamoru gives Usagi an engagement ring. Chibiusa and Diana return to the future. While Mamoru is about to leave, three new popular idols named the Three Lights appear. A new enemy, going by Sailor Iron Mouse, extracts a woman's blank Star Seed, but Eternal Sailor Moon appears to stop her. However, the woman who had her Star Seed extracted, transforms into a Phage, a comical and monstrous form of a human once their Star Seed is exposed and allowed to turn black, lacking a true shine...