As sailors aproveitam um breve momento de paz, mas só até o Golden Crystal de Mamoru ser roubado por Sailor Galaxia e as Sailor Star Lights aparecerem.

Títulos Alternativos:
US: Pretty Guardian Sailor Moon Cosmos the Movie Part 1 | IT: Pretty Guardian Sailor Moon Cosmos: Il film – Parte 1 | DE: Pretty Guardian Sailor Moon Cosmos: Der Film – Teil 1 | BR: Pretty Guardian Sailor Moon Cosmos: O Filme – Parte 1 | FR: Pretty Guardian Sailor Moon Cosmos : Le film, 1re partie | KR: 극장판 미소녀 전사 세일러문 코스모스 전편 | CN: 美少女战士Cosmos前篇 | TW: 劇場版 美少女戰士Cosmos 前篇 | ES: Sailor Moon Cosmos: La Película – Parte 1 | HK: 劇場版 美少女戰士 Cosmos 前篇 | TH: พริตตี้ การ์เดี้ยน เซเลอร์ มูน คอสมอส เดอะ มูฟวี่ ภาค 1 | HR: Kozmos lijepe zaštitnice Mjesečeve ratnice: Film, 2. dio | MX: Pretty Guardian Sailor Moon Cosmos: La película Parte 1 | HU: Pretty Guardian Sailor Moon Cosmos – A film | PL: Pretty Guardian Sailor Moon Cosmos The Movie: część 1 | FI: Pretty Guardian Sailor Moon Cosmos The Movie, osa 1 | CZ: Pretty Guardian Sailor Moon Eternal The Movie: 1. část