"Goodnight, Ginny!"

"Goodnight, 'mione."

Hermione wandered sleepily up the stairs of number twelve Grimauld Place and into her room. She removed her fluffy pink dressing gown and climbed into bed, pulling the thick cover right up to her chin. Several nights ago, she had been rummaging around under the bed to see what had been left there, and she had found a book. This always excited her, and it excited her even more when she realised it was a notebook filled with handwritten spells. Flicking through the book, however, had caused her to go weak at the knees.

As soon as she had entered puberty, she had become desperately horny without really understanding what she was feeling or what to do about it. For months she avoided the subject, repulsed by what was happening to her body. She was becoming attractive, and thus constantly looked up and down by older boys in corridors, ogling at her with poorly-concealed boners in their robes. She just pretended it wasn't happening, all the times her nipples randomly hardened during a shower with the girls in her dorm, all the times she woke up with soaked underwear after a wet dream. She repressed it all; no-one could know that the stuck-up nerd at the front of class was actually trying her hardest not to daydream about being bent over her desk, her skirt pulled up over her back, her panties pulled half-way down her thighs and having some boy's huge, throbbing cock thrust in and out of her pussy like a toy. These feelings became ever stronger, permeating almost every waking interaction. She started wearing two pairs of underwear because she got soaking wet just walking around the place.

This all changed when her, Ginny, and the others had moved into Grimauld Place over the summer and she had stumbled across this book. Filled with diagrams and notes about boys' and girls' anatomy, positions, techniques, and spells - this book taught her everything she had wanted to know since her sex obsession began. She read the whole thing cover-to-cover, then again, then decided she needed to practice. She had learned what a clitoris was, and, using the suggested techniques from the book, found it with her index finger and touched it until she was rocking her hips to orgasm. This was her nightly routine: retire to her room for the night, and touch her clitoris until she was red and breathless, then fall asleep.

Tonight was no different. She pulled the duvet tight, and imagined everything that had turned her on that day: Harry's obvious bulge when she got out of the shower, Ginny's gorgeous tits, the way Cho and Luna used to bed down in the dorms, their skirts riding up their butts. Her hand moved down her body, slipped down the front of her pajama bottoms, slipped down the front of her panties, and onto her hairy, young pussy. Moving up and down her slit a few times to warm up, she felt her juices spread and she found her clit. Brushing the tip gently with her middle finger, she began moving in slow, gentle circles. Her hips moved in time, arching up and down in time. Her other hand moved up to cup her left breast, massaging gently. She rubbed herself a little faster, breathing faster and deeper and she descended into her world of pleasure.

Ginny reached the top of the stairs, and, noticing Hermione's door was slightly ajar, moved to close it in order to give her privacy from the boys. As she got close to her door, she heard a faint moaning and rustling of covers. Peering around the door, she saw her best friend in bed, fully covered, but clearly moving her hips and her hand... Thoughts began to race through Ginny's mind. Oh my god! What is happening! Is she really masturbating!? That's... that's... hot... actually. No stranger at all to self-pleasure, Ginny felt a wetness forming between her legs. She stood watching her friend getting herself off, and soon she had stuffed her hand down her pajamas and was masturbating too! She kept her ears on high alert, although the risk of being caught was kind of helping. Hermione was visibly close to orgasm, and soon enough she took a sharp breath, arched her back as far as it would go, and almost silently shook until she was done. Realising that she was now at serious risk of being seen, Ginny crept away to her own room, where she imagined her friend cumming over and over again until she herself was red in the face and making a mess of her bed sheets.

The next morning, Mrs Weasley announced that Bill and Fleur would be joining them for a few nights, and that Ginny would have to move into Hermione's room to make space. She said there was only a double bed, but that didn't matter - they could make do. Hermione tried hard to conceal her emotions, but Ginny could see she was disappointed; clearly she like her alone time. Ginny was looking forward to it, she had no idea until last night that she wasn't straight, and she was hot for Hermione. She didn't know if Hermione was similarly inclined, but she could find out!

That evening, Hermione declared she was going to bed - she thought she could get it out of her system before Ginny came up later. But, to her annoyance, Ginny was also apparently tired and climbed the stairs with her. Hermione dropped her dressing gown and slipped into bed. Ginny began removing her pajama top.

"I always sleep topless so I don't overheat," - a lie - "you don't mind, do you?"

"I... uh... ye... no... of course not..." stuttered Hermione, her eyes fixed on Ginny's perky breasts, her face flushed with embarrassment. So Ginny had her answer.

"I'm also commando underneath, unless that makes it weird?"

"No... um... that's great! I mean... that's fine. Makes no difference to me." An increasingly flustered Hermione couldn't keep her eyes off her friend's gorgeous body. She felt the usual, semi-permanent wetness in her panties return.

"Shall I turn off the light?"

"Sure... erm... goodnight Ginny."

"Goodnight, 'mione."

Ginny allowed a moment's silence to pass, as the two girls tried to become comfortable.

"You know 'mione... if you wanted to masturbate, I'd be fine with it."

"What!? What are you talking about that's gross! I don't do that!"

"It's okay. I don't want this to be awkward, but you left the door open last night and I saw you. And I watched."

"Oh my god! Ginny! Why on Earth did you watch? What's wrong with you?" She was glad it was dark, so Ginny couldn't see how mortified and angry she was.

"Sorry! I didn't mean to! It was just really hot, and I didn't realise I was into girls and I just..."

"Got distracted?"

"...basically... Look, I am sorry. I shouldn't have watched. But I just thought, I'm into you, by the way you looked at my tits I think you're into me, and now that we're sharing a room for a few nights, I just thought that maybe we could... you know...?"

"You want to... have sex?"

"We don't have to. We can have sex, or just masturbate next to each other, or forget the whole thing and go to sleep. But I am super horny, so if we don't do anything I am going to need to go to the bathroom for a few minutes..."

"I suppose there's no harm in touching ourselves. It's only biology."

"That's my girl. Do you want to kiss?"

"Okay."

Rolling onto her side, Ginny leant over Hermione. Cautiously at first, then with an increasing lust, the two girls kissed. Passionately, deeply, they discovered an attraction to each other. Feeling her pussy begin to drip, Ginny readjusted herself so they were both lying on their backs, one hand holding the other's, the other hand hanging out of their pajamas, rubbing their pussies as if they depended on it. Feeling each other's movements in the bed, listening to each other's deep, harried breath and quiet moans, they brought themselves closer and closer to orgasm. Squeezing each other's hand, the only thing reminding them of reality in their pleasured haze, they got nearer and nearer.

"Uh 'mione... I'm so close! I can feel my pussy almost cumming!"

"I'm close too! Uh!" Came the whispered reply.

"Are you going to cum?"

"Yeah I'm going to cum!"

"Shall we count down?"

"Okay, I'm so close!"

"Don't cum until I say! Ten... nine..."

"Eight... uh... uhhhhh... seven..."

"Siiiiiix... oh god... five four... uh..."

"Three... please I need to cum! Please...!"

"I'm so fucking close! Two... ... uh... oh... one... ahhhh..."

"Now!? Pleeeeaase..."

"I'm cumming, 'mione! I'm cumming!"

"Uhhhhhhh me too..."

Hermione's hips thrusted downward, her back arching, legs quivering. Ginny sat almost upright, flicking her whole hand across her clit so fast it caused an involuntary scream to escape her mouth. Lightening bolts shot up their bodies, spreading along their bums and up their backs. Warm, sticky cum poured out of their cunts, creating a puddle of juices that soaked through their pajamas and into the bed sheets. They removed their hands from their pussies, thick strands of their grool covering their fingers. The licked each other's hands clean, and used a cleaning charm on their clothes and bed. Lying back down on their backs, the two girls looked at the ceiling, unsure whether to talk about what just happened. Ginny broke the silence first.

"I enjoyed that... Did you?"

"Yeah. I've only ever been alone before."

"It felt really good to share it with someone else. I'd like to do it again - another night - if you want - you don't have to."

"No, I want to. It was really good. Um... this might get weird..."

"I don't think so. Two young girls discovering sex together isn't weird. Is it?"

"No, probably not. Do you mind if I show you a book...?"