Disclaimer: Hogwarts and most of the characters/settings/ideas belong to J.K. Rowling. The plot and main characters of this story are ours, though.
This takes place shortly after the Marauders graduate, so the only characters that are the same are the teachers. There will be some references to the Marauders, though.
The rating of M if for later chapters, and if you have a problem with yuri, then this might not be the best story for you.
Also, the updating will take place once every week or once every other week. Both of us being in high school with an insane amount of homework, spending a lot of time working for tech crew, and practicing music stuff, we write when we can; which is usually rather inconsistent.
And here's a VERY important thing to know BEFORE reading- the chapters alternate between characters. Chapter 1 is from Ren's POV, chapter 2 from Layla's, etc. Don't think that it means it's the same thing just in different words, because that's not true. It gives more depth to each character, showing their thoughts and feelings about the same things, and most of the time (with the exception of chapters 1 and 2) the twins are doing their own thing, so the chapters are very different.