Sailor Moon
The Bond of Destiny: Uranus's Distant Past (3x17)
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Haruka thinks about old times, while Usagi and the inners explore their soon-to-be high school, where they meet Haruka's old racing friend, Elsa Gray...who is a target. Uranus and Neptune, along with the inners, fight to save her heart against the daimon, and her heart is not pure, so it is restored.