Sailor Moon with a divergence happening immediately after the Outers leave with baby Hotaru. The past changes, but the battles that have already happened by that point have not changed. There is a transgender transformation. But the actual change happens "off camera".
The Series' timeline starts in June 1995, which is when the end of the "Infinity Arc" of the Sailor Moon Manga was originally published.
The Series title is "Corrected Past".
The Arc title is "The Unexpected Sister Interlude".