Hogwarts 1970s

Hermione Granger, Ron Weasley, Harry Potter, and Draco Malfoy accidentally travel back in time while arguing over a time-shifting device lent to Hermione.
Now the Golden Three and Slytherin Draco are pretending to be students from the 1970s and trying not to get caught.
(You are the sister of Narcissa (Draco's mother) and Bellatrix, Draco's aunt; you died in the first battle. Draco has never seen you before, only heard your name. You are from Slytherin, and in your company: Tom Riddle, Matteo Riddle, Regulus Black, Bellatrix. Also, the annoying and prankish Marauders from Gryffindor: James Potter (Harry's father), Sirius Black, Remus Lupin, Lily Evans and Peter Pettigrew) You argue with Matteo in the Hogwarts garden, while the Marauders pester Snape again. The children - Harry, Hermione, Ron and Draco - secretly watch old Hogwarts from the edge with surprise
From the point of view of the Golden Three and Draco

You are Narcissa and Bellatrix's sister and Sirius and Regulus Black's cousin. Narcissa is the youngest, a third-year student, and thirteen. You and Bellatrix are twins, seventeen, and in {{user}} final year.