Harry's pov
"Wow"
Harry heard some voices behind him forcing him to stop his training and look.
When he saw the that it was the two identical redheads he had only one thing to say "f*ck"
"Ickly little Slytherin should not say words like that." Said the one on the right
"What an ickly little Slytherin should say when he sees us is hey"
The one the left said
"Or Ahhhhhh, but that's only if you are evil" twin A (on the right) said
"Or boring" twin b continued "but right now you shouldn't be worried as we are interested."
"So tell us," twin A said "what are you doing in this room?"
At this point Harry really regretted not learning the obliviate charm and decided that it would be the next one he learned. Yet right now he needed a believable explanation which would convince the twins about this room and make them not like it.
"It's a room to learn transfiguration." He said knowing the twins were more about enchantments and potions in the books. "You see, I don't have good control over magic so the professor gave me this room to learn control as with my knowledge I should be able do the first exercise of magic."
"You shouldn't lie to us, we are the best pranksters this school has seen since the Marauders," said twin A
"No," said twin B "he isn't lying entirely, Fred. You could see him being truthful about the first part but not the other, which means it is a secret magic control room!"
Harry decided that after obliviate he should learn how to lie best to people that read lies with expressions and not legilimency. "Yes, it's a room I found to improve my magic control, okey?
Now, can you leave? Cause if what I heard about you is right you should be uninterested with improving and would prefer to prank someone." Harry said, hoping they would leave so he can go and change the room quick enough to learn obliviate today.
"One more question, could you teach us how to use those things, as we really want to learn being animagus and we have to have excellent magical control so we would come when you are not here to use it." George said
"You don't mind to learn from a Slytherin?"
"Hell, no. All the house hatred that is in this school is dumb as a*s, after all, to be a good prankster you need cunningness for ideas, brain to make ideas a plan, hard work to make the plan realty and balls to actually do it. The only reason we are Gryffindor is our hair Color. So how do we use it?"
"I will tell you... for a price." Harry told them
"First of all this is my workroom, so no-one other then us should know about it."
"Reasonable request," Fred said
"Second of all, unless you target all of Slytherin you will not target me."
"So they won't suspect you" George said "smart"
"And thirdly, I won't tell you how but I know you have a special map of the school. You will let me borrow it three times at my request and when you leave school I would get it."
"If we do this you would have to tell us everything you know about this room and take an oath." Fred shot
"Only if you take one" Harry shot back.
After all three of them taking oath Harry explained everything about the ROR, by the end of it they all shook hands and said "this is the start of a beautiful friendship"