Harry Potter and the Classroom Orgy

Harry Potter was sitting in the common room in Gryffindor Tower when Hermione and Ron came down from the stair case that led to the dormitories.
“What were you two doing up there?” Harry asked.
“Nothing” Ron answered guiltily.
“Oh come on you to we’ll be late for McGonagall’s class.” Hermione said in a breathless voice. They all went out the portrait hole and continued on to Transfiguration. Harry still curious as to what Ron and Hermione had been doing. They arrived at Transfiguration just in time and they quickly took their seats. McGonagall walked in and called everyone to order.
“Today we are going to learn how to transfigure a normal object into air thus removing it.” McGonagall said briskly. Harry was interested, this sounded really useful. Harry and Ron and Hermione set to work trying to make the objects they had been given (a feather) into air. Hermione of course had the most success actually getting half her feather to vanish. Ron was having a lot of trouble and kept making his feather do back flips. Harry had managed to make the very tip of his vanish and the rest to turn yellow. This continued for almost 30 minutes.
Hermione let out a squeal as hers vanished completely.
“I did it! Professor, I did it!”
“Good Granger now get another and try again.” McGonagall said, pleased.
Hermione reached forward to grab another but it was to far so she stood and leaned over to reach it. This had an effect Hermione had not intended. As she bent over her skirt lifted and soon her panties were showing this got Harry and Ron’s attention. They both looked very closely and saw where her mound was. Harry was hard and he stroked his cock through his pants. Then Ron pointed his wand at Hermione’s panties and they vanished. The spell had worked perfectly and now they were staring at a moist, shaved pussy.
“That whore!” Harry thought to himself as he saw Hermione’s shaved and dripping pussy. Ron was gaping at the sight and as Hermione bent further over her cunt wasn’t the only thing showing. Her ass was nice and was staring them in the face. Harry was harder than he had ever been in his life. He looked over to see Ron his cock was hard and from the bulge he guessed that it was at least 7 inches or more. Harry looked back at Hermione only to see that she was sitting down. Harry took the last few seconds to just stare at that shaved cunt. When Hermione looked at them she noticed them staring at her.
“What?” She asked innocently.
“Nothing!” Both Harry and Ron said at once.
“What is it?” She asked curious.
“Honestly it was nothing.” Harry said as Ron was still recovering from what they had seen. Hermione took no notice of them after that so they were both free to imagine her pussy as they had seen it. Harry was rock hard and needed relief so as soon as the bell rang he bolted from the class and ran to the boy’s bathroom. He left 10 minutes later much relieved.
The rest of the day was uneventful and so passed rather slowly. When they were about to go down to dinner Ron told Hermione that he and Harry would catch her up and when she left Harry asked.
“What’s up?”
“Fred and George said they had something to show us and you know Hermione she hates anything against School rules.” Harry was interested Fred and George had been known to tamper with things and create strange things and usually Harry thought that they were a laugh. Ron led Harry over to Fred and George and sat down.
“So what you got for us?” Ro n asked eagerly.
“A very special item that George and I grantee beyond any doubt works.” Fred said proudly.
“So what is it?” asked Harry excitedly?
“Here it is!” George said with a flourish as he drew from a pocket what looked like a sprinkler.
“What is that?” Harry asked.
“This Harry is a orgasmit!” Fred said proudly.
“A what?” Ron asked.
“An orgasmit, it makes anyone so horny that they have to have an orgasm. It could make anyone do anything to orgasm. We tested it and it actually made one guy in our class start jacking off right there in the middle of class, and one girl shoved her wand up her pussy because we used this baby on her.” Fred explained this and gestured at the orgasmit the whole time.
“Wow can we see how it works.” Ron asked eagerly.
“Of course we readied a whole demonstration for you.” George said.
“All you have to do is set it somewhere flip this switch and then get into another room within 20 seconds or else you’ll be caught by it.” George said this as he placed the orgasmit in the middle of the room then he flicked the switch and he and Fred walked quickly from the room followed by Harry and Ron.
“What now?” Ron asked.
“Wait 1 minute after it starts before going back in.”
“How long are the people under it’s influence?” Harry asked.
“Until you turn it off, it will keep people already it’s influence under it’s spell until you turn it off.