(Before I get into the review, I just wanted to give a tip for formatting: if you're copy-and-pasting text from a Word document, another website, or something like that, you can use Ctrl+Shift+V to get rid of all the formatting. This way, the formatting of your text will fit the new website, instead of using the same formatting from the older websites, which may not work.)
But that's just a nitpick! (I'm really formatting-obsessed, so please feel free to ignore me, haha.) I really enjoyed reading the stories of all our favorite Marauder Era children. It was really interesting to see your interpretation of their family's reactions, their personal values, and previous relationships (such as Sirius and Marlene). I rarely get to see this part of their stories, so this was really interesting.
Perhaps the part I found most interesting was the beginning, where Sirius and Marlene were getting dropped off by their parents. I liked how the two already knew each other before boarding the train to Hogwarts for the very first time, and I liked how you made a point to show that Sirius was different from the rest of his family, when he went to go help the fallen girl. Even though his parents kept pushing him to act as though he was above everyone else, Sirius still helped Dorcas. Marlene was a sweetheart, as well.
I'm really excited to get to the LGBTQA part of the story, haha, so I hope you'll continue on with this! It was a really entertaining read, and I can't wait to see more.