The usual disclaimers apply. Harry Potter and all Characters are property of J. K. Rowling. This story takes place in Harry Potter's fifth year at Hogwarts
Part 2
A week later Harry and the rest of the students were back at Hogwarts. Lessons began and were harder than ever. What with that on top of his almost constant detentions with Professor Umbridge, Harry hardly had time to wack off let alone try and put his schemes into action.
Ever since that night outside Fred and George's room he had been dreaming about figuring what they were up to. From things he had read and from stories the other Gryffindor boys had told him he reckoned he had a pretty good idea. He had begun to come to terms with the fact that he would rather fantasize about the twins than girls and was ready to find out more.
Harry had been keeping an eye on the twins and noticed that every evening around 7 pm they would enter the 7th floor corridor and then vanish. Harry knew quite well where it was they were going. He had spent a good many hours this year watching dots coming and going from that very spot. It was the Room of Requirement. They would emerge an hour or two later and head back to the Gryffindor common room. Harry had hatched a plan that involved distracting one of the twins, stealing a hair, using the Polyjuice potion to become Fred or George and taking their place in one of their nightly get-aways.
After weeks of waiting that chance finally arrived. Harry over heard Professor Umbridge yelling at Fred in a hallway just off the Great Hall and giving him detention; starting immediately. Harry knew from experience that a detention with Umbridge would last several hours. He looked at his watch, it was just after 6 pm. Harry decided to put his plan into action.
As Fred followed Umbridge, Harry walked up behind him, reached up and pulled out one of his long ginger hairs. Fred turned around to see what had happened.
"Harry?"
"Sorry," Harry replied "you had a spider in your hair."
George said "oh.. well thanks I guess. This old bat just gave me lines for writing poo on the wall. I better catch her up. See you later Harry "
Harry watched him walk around the corner and then ran as fast as he could up to Gryffindor common room. He stashed his bag and pulled out the old flask he had taken from the imposter-Moody's trunk. With flask and hair in hand he sped down the hall to the Prefects bathroom, the one he had used the year before to figure out his Tri-Wizard egg clue. Luckily for Harry the password was still the same. Obviously who ever set the passwords didn't feel a bathroom was that big of a security threat.
He stepped inside, made sure it was empty, and locked the door. Harry walked over and stood in front of the gigantic mirror that stretched from ceiling to floor. He slipped of his robes leaving them in a pile on the floor. He then pulled his shirt up over his head leaving his upper have exposed. He continued undressing until he was left standing in only his over-sized second hand boxers that, like everything else he owned had once belonged to Dudley. As Harry stood there he looked in the mirror and admired his growing body.
His chest was by no means muscular, but neither was it chubby. A naturally slender frame coupled with frequent Seeker training left him with a tight physique. He could just make out the developing outlines of pecs. Hi nipples, no doubt due to the cold stone bathroom were hard enough to cut glass. Harry lifted his arms and admired the armpit hairs that had been growing there for the last few months. They were jet black, like his hair and still pretty sparse. At last he pushed his boxers to the floor and stood there naked. He took a quick look at his dick which was in its current 3" soft form and his small patch of pubes and decided to get on with it.
He dropped Fred's hair into the flask which began bubbling and churning before turning a copper-gold color. "Much better than Crabe and Goyle" Harry thought to himself as he lifted the flask to his lips. With one last deep breath he took a large mouthful of the potion. For a few second nothing happened and then Harry felt the familiar painful creeping feeling that meant the potion was working.
He watched in the mirror as his black hair began to turn bright red and lengthen. His face began to transform as well. His glasses fell off as he ears shifted place but Fred didn't need them anyhow. Freckles began to pop up all over his face. Meanwhile his legs began to lengthen and thicken as he became taller. He could feel his pores ache as a layer of thick red hair grew over his legs. The same feeling was occurring under his now powerfully muscled arms. He lifted them to see a mass of red hair replacing his own sparse patches. He felt his chest expand as full on pecs bulged. His stomach grew wider as Fred's wider frame took over leaving a defined set of 6-pack abs where Harry's flat stomach had been.
Finally Harry watched as his balls began to grow, reaching nearly the size of golf balls. His 3" cut cock began to lengthen as well, stopping only when it had doubled in length and grown a foreskin over the head. His pubes had been replaced by a bush of fiery red hairs. Harry stepped back and admired his new physique. He had to admit that Fred had an amazing body and the red hair only made it hotter. After weeks of fantasizing Harry now knew what the twins looked like naked! He reached down and gave his new enlarged cock a tug. It felt weird in his hand. A strong desire to get it hard and have a wank came over Harry but he knew his time was limited and it was nearly 7 o'clock. He pulled on a set of extra robes from a cupboard nearby, tucked his own things neatly away in a cubby and ran off to meet George at the Room of Requirement.
He arrived 5 minutes later to find George waiting. "There you are Freddy... I thought maybe you stood me up again" said George as he walked over and gave Harry's butt a slap. "Are you ready?"
Harry nodded and followed George into the Room of Requirement. Harry was amazed to find that the room had transformed itself from their D.A. practice room to a small candle-lit chamber with a large bed on a dais in the center. George took Harry's hand and led him over to the bed. Harry wasn't sure what to say but that turned out to be unnecessary as George pushed Harry onto the bed, jumped on top of him and pushed his mouth up against Harrys.
At first Harry was so surprised he forgot to respond but after a few second he realized what was happening and although he had only ever had one kiss, began to make out with George. George, obviously sensing something was different asked "Are you ok Freddy?"
"Fine," said Harry in Fred's voice "Keep going."
George began kissing Harry again and then slowly began to plant soft kisses down his neck and onto his shoulder. "I've been waiting all day for this brother" he said as he sat up and pulled his shirt off. Harry looked up at George's chest to see it was identical to his. The sight of his busy pits as he pulled off his shirt caused surge of blood to shoot to Harrys now growing cock.
George, obviously thinking Harry's lack of movement implied he wanted him to help reached down and pulled Harry's shirt off as well. After a few more minutes of making out George began to slowly run his tongue down Harry's chest. He stopped to nibble playfully at the nipples, something that made Harry's semi hard dick pulse. George continued down and as he reached Harry's groin he began to rub the noticeable bulge. He then forced Harry's hips up in the air and pulled off his pants and underwear in one motion. Harry lay there completely naked in Fred's body and George looked at him with delight.
What happened next surprised Harry who had never fooled around with anyone before. George grabbed Harry's dick and began jerking him off. The sensation of having someone else's hand pleasuring him nearly overcame Harry. After a few minutes George stopped and Harry looked down to see his rock hard 9 inch cock sticking straight up just inches from George's mouth.
George looked up and grinned before sliding Harry's member into his mouth. Harry was in heaven. He had never in his life felt anything like that. The feeling of George's warm wet mouth as it bobbed up and down on his manhood was simply amazing. Harry threw back his head and closed his eyes as George did his work. He laid there mesmerized by the feeling of George taking him in. He looked down to see that George was taking all 9" of it. Within a few minutes of this Harry was nearly ready to cum. George must have sensed that because the wonderful feeling suddenly stopped. Harry opened his eyes to see George crawling onto the bed beside him.
A few second passed ... "Well?... are you going to do me?" said George.
Exactly what George was expecting suddenly dawned on Harry. He began to get nervous. He had never done anything like this before. Following George's example though he rolled over on top of George, feeling their chests rub against each other. He kissed him a few times and then lowered himself to George's pants. He struggled but finally got them off to reveal an identical 9" uncut dick just like his. Harry looked down at his own manhood again and gave a little chuckle. His dick bent slightly to the left while Georges bent slightly to the right. "I guess they aren't 100% identical after all. He bent in and gave the protruding tip of George's cock head a little lick. It tasted fleshy and had sort of a musky smell about it.
He held it up wondering how he would ever be able to fit this mother in his mouth. As he lowered his head and cupped his lips around the shaft George took the initiative and pushed Harry's head down. George's cock filled Harry's mouth and hit the back of his through causing him to gag. He tried to get it out of his mouth but George was having none of it. He kept grabbed Harry's long red hair and began forcefully bobbing his head up and down. Harry was chocking and sputtering but it was no use. After a few seconds the initial shock wore off and he began to work with George's thrusts instead of against them. He managed to relax his throat muscles enough to get in about 6 of George's 9 inches.
Harry got into a good rhythm and after a couple minutes began to actually enjoy the way George's cock filled up his mouth. He was sort of disappointed when George pulled his head up off his cock.
"What's wrong?" said Harry.
"Well besides the fact that you suddenly seem to have forgot how to suck cock, nothing." Answered George. "Now get up here and lay on your back."
Harry, wondering what was coming next, obeyed. George positioned himself between Harry's legs and lifted them over his shoulder. He grabbed his wand, pointed it at Harry's hole and muttered "Lubricus." Harry felt a cold tingly sensation in his butt crack as a thing stream of a gel like substance left George's wand. George leaned forward and placed the tip of his thick cock at the entrance of Harry's hole. He pulled his foreskin back a bit and in one fluid motion shoved the entire length of his cock into Harry's ass...