The first order of business was to figure out how a pair of twins and a mid 30's potions professor, all of whom were members of The Order of the Phoenix, were going to live in the same small box together for the next 5 weeks.
Thankfully, they were wizards. They had magic to help make the living arrangement a little more manageable. The room for the three men, although two of which were much younger men and may not be considered as such by others, was a basic square. There was one dusty closet with a sliding door with enough room for maybe a dozen shirts.
Fred and George would have been content with pretty much anything. They were still humbled and excited enough about being a part of the Order that had their Mother told them their chambers were two hammocks beneath the kitchen table, they would not have thought about it for a second. Just like camping, they would have said.
Severus, Fred, and George were on the ground floor at the very end of the hall, tucked away on the left back side. The hallway was shared with a 3 other smalls rooms; a pantry with some cooking supplies and non-perishable items, a cleaning cupboard, and a larger storage closet with old cauldrons and broken brooms. Snape, Fred, and George were the only wizards to occupy a room down this wing.
Across from the bedroom was an older, worn out but not overly used, wooden door that lead to a side garden with no real garden, just more an idea of a garden. 3 wooden stairs lead down to a small browning patch of what used to be grass. It was only a space about 2 by 3 meters. But, that was without magic.
Magic was all Snape needed. A charmed wizarding tent. Magic.
From the outside the tent would appear old, tattered and grey, looking only large enough to hold two very modestly sized people. That is if those people were both standing sideways with their backs to one another.
The charmed wizarding tent would work well enough for Snape to have a small and inconspicuous, simple yet working potions lab.
Severus Snape was talented, the most gifted potions master in centuries. He was equally resourceful. The potions shed was roughly a fifth of the size of his Hogwarts classroom. The size of a large, rectangular office. There was a soft, dirt floor with wooden panels along the walls and two large tree trunk looking beams in the middle holding up a slightly raised ceiling. Along the length of the shed ran a standing work bench height mahogany table, end to end. There was a lone stool, an uncomfortable looking dark forest green sofa chair, a small bookshelf full of potions text books, an antique ingredients cupboard and a set of shelves that held various pots and brewing apparatuses.
The potion shed was perfect. Magic.
Not only did Snape have quick access from his shared chambers, is was also on Order's grounds. This made it a safe apparition space. Severus did not want to be returning from the inevitable Death Eater Meetings having to somehow make it through the front door of Number 12 Grimauld Place, walk in whatever capacity her could across the main foyer entrance and to his quarters all the while more likely than not nursing some painful affliction.
Alongside his side of the bedroom and flush with his bed, Snape simply put up a hanging, mirrored tapestry that reflected his section of the room as though he was not there. When Fred and George looked across, they would see the peeling smoke stone coloured wall paper that was in reality another 5 feet back.
Across the room from Snape's invisible nook were two single beds with Gryffindor red knitted quilts. The head ends of the bed had pushed together, making an L shape where Fred and George slept. With a quick muffliato, Snape need only to crawl into his Twin bed behind the make-shift invisibility curtain to avoid all associations and consultations with the two young red-heads. For a shot while, this suited the three of them fine.
But, Fred and George Weasley had a secret. Although when students at Hogwarts they did shamelessly caused more than one ruckus and were a serious nuisance to most of the faculty, they did not in fact dislike the teachers that others may think they would dislike. Namely, Professor Snape.
Fred and George did not hate potions. Fred and George did not hate Snape. It is actually quite the opposite. The twin's success in their business "Weasley's Wizard Wheezes" stems from their ability to create products that, yes are fun, but use advanced magic in a controlled way. They learned a great deal of this from their potion's professor.
Fred and George's brainstorming, work books and notes look frightening similar to those of Severus Snape when he is trying to create a new brew or ameliorate an already existing one.
As it is, there is no amicable relationship between the young ex-Hogwarts students and the potions professor, they never had that opportunity. Snape always viewed the boys as distracted wizards with great potential who wasted their talent on silly tricks and gags. The boys saw Professor Snape as an intelligent and skilled wizard who had no time for teenage students with spirited attitudes and no desire for a formal academia life.
It is in close, forced quarters and high stress situations that the most precious of things are fostered and found.
