Sailor Moon S: The Movie - Hearts in Ice
Toei Animation
When to watch: Best watched after Episode 127 of Sailor Moon for full context.
Released December 4, 1994 with a 59-minute runtime, Hearts in Ice sends an unnatural snowstorm over Tokyo as the ancient snow queen Kaguya, awakened aboard a returning space shuttle, sets out to freeze the entire planet. Both the Inner and Outer Sailor Guardians must team up to stop her — while, in a quieter subplot, Luna falls for a human astronomer, Kakeru, whose girlfriend is the astronaut aboard the very shuttle carrying Kaguya's power back to Earth.
Related Series
Frequently Asked Questions
Does Hearts in Ice include the Outer Guardians?
Yes — since it releases during the Sailor Moon S season, Sailor Uranus, Neptune, and Pluto all appear alongside the Inner Guardians.
Is the Luna subplot in Hearts in Ice important?
It's a self-contained emotional side story about Luna falling for a human astronomer, adding a poignant, bittersweet dimension to the film without affecting the main TV series continuity.