So, Twilight Sparkle is a colt in this one. I was a little confused at first too. This is another one of those giant 40+ page manga-style comics, following the adventures of a rule63 version of the best pony.
If that sounds like something you would be interested in, hit up the gallery of all pages here. The "next" buttons are missing from a few of the pages, so that might be the best way to do it.
