Winterstar

"My...godmother?" Harry stared at the letter. Beside him, Remus's face tightened. Harry turned on him. "WHY DIDN'T YOU TELL ME?"...Not AU (as readers will see later). This is the story of Sirius Black's last years of happiness before the storm that wiped away everything and everyone he ever cared for.

It's still the first day of term. The Marauders, naturally, take it upon themselves to "help" the new girl Sabrina find the Potions classroom, and find that there is a rather unexpected person in the Potions class.

Lucius Malfoy and the Marauders...they haven't seen him since their early years at Hogwarts. They also have to deal with Sirius's not-so-lovely cousin Narcissa, who takes an immediate liking to the coldly handsome Potions Assistant...