"Oh my god!" Shouted Cho. "What the hell is going on? That's gross!"

Hermione and Ginny jumped out of their skins, quickly finding some robes to cover themselves.

"Um... Cho... hi..." stuttered Hermione. Luna was not so ashamed:

"What does it look like to you?" Standing in full view, watching Cho's eyes widen.

"It looks like... you were having... sex...?"

"Correct."

Hermione and Ginny held their breath, bright red with embarrassment - sure they'd ruined their friendship with Cho, and in the process made for a very awkward year in the shared dorm.

"That's... disgusting! How could you do that in a shared dorm!"

"We're really sorry, Cho. We didn't mean for anyone to see." Interrupted Hermione.

"I don't care if no-one was meant to find out!"

"..."

"I don't want this happening ever again!" She stormed out.

"Sorry..."

"Yeah, sorry-"

The three girls stayed silent for a moment, completely at a loss as to what to do next. Ginny broke the silence.

"I'm not really in the mood anymore, to be honest. I feel really bad."

"Yeah, me too. Should we go to bed, Luna?"

"I think she's in to me."

"Of course she's not!" Replied Ginny.

"Did you see the way she looked at me?"

"She was in shock, silly. That can happen when you walk in on three friends you previously assumed to be straight virgins with their mouths clamped around each others' vaginas. Let's just get dressed and go to bed. Hermione?"

"I agree. Luna stop being silly. Not every girl here is going to be a promiscuous lesbian. It's probably just us."

"I suppose. We should probably wear pyjamas, right?"

"Definitely. No underwear though..."

*** The next morning. ***

"Morning!" Hermione greeted the dorm.

"Morning, Hermione." Replied Luna.

"Where is everyone?"

"Ginny left for breakfast, Cho and Parvati were nowhere to be seen when I woke up."

"Right."

"We should probably get going too. Class starts soon."

"Right. Let me grab some clothes."

"You know... why do have time to shower first?"

"I guess I do need cleaning up after last night, I was so frustrated it was hard to sleep. We'll have to be quick!"

Heading for the shower, Luna slapped Hermione's arse and helped her get her clothes off. Turning on the hot water, they immediately got in and started kissing, feeling each others' behinds and pussies - no time or need for foreplay. Reaching for her wand, Luna cast a phantom dildo charm on Hermione, causing her to fall to her knees and sigh in pleasure. Luna merely thrust her hips forward, moaning as she flicked her clit.

"I feel like I'm going to cum already!" Groaned Hermione, watching as the pussy above her dripped down onto the shower floor. "That's the spot... right there!"

"Is it right on your G-spot?"

"Uh-huh..."

"I want you to ejaculate for me, are you going to?"

"I think so... I can feel it building..."

"Mmmm... You are forbidden from touching yourself, you must cum from cock only. Do you understand?"

"Ah-hah... ahhh"

Hermione's eyes rolled back in her head as she looked up at Luna. Red in the face, soaked brown hair clinging to her skin, she was sat on the shower floor with her legs bent back under her, her pussy almost on the floor as the magic cock pressed in and out, massaging her sweet spot, building pressure as it fucked her tirelessly.

"I'm... I'm gonna cum... Oh yeah I'm gonna cum... uhhhh!" Her body shook as her orgasm took her, releasing torrents of cum over the floor, shooting forcefully from her vagina. Struggling not to finger her clit, she placed both hands on the floor and tensed her muscles, pushing out every last drop of cum she could until she relaxed and looked back at Luna. As a way of thanking her friend for her orgasm, she stopped Luna touching herself and drew herself up on her knees, taking the swollen, erect clitoris in her mouth and sucking. Moaning in appreciation, Luna took Hermione's head in her hands and kept her there, feeling her tongue dance over her most private part until she too was red in the face, feeling a wave of pleasure radiate through her.

"Ugh, 'mione you are so good at that! How did you learn?"

"Just a knack I have..."

The two girls washed themselves, and stepped out of the shower to dry off.

"Can I ask you a question?" Asked Luna.

"Of course."

"Have you ever thought about having a penis?"

"Um... not... really...? Why?"

"No particular reason, I've just been thinking about it recently. I think men have the better deal. Sexually, I mean."

"How do you work that out?"

"Well, we have arguably stronger orgasms, and traditionally more of them, but magic allows men to have as many as us anyway. And men have the sensation of ejaculating - properly, I mean. Not the weak, water leaking that us women do. I don't know, I just think it would be more fun to fuck someone. And it would probably be better than the dildo spell. Don't you think?"

"Um... sure, Luna. Why not."

"I think there's a spell in that book you have, I might give it a go."

"You probably have to be way better at transfiguration for that."

"Apparently it's actually a relatively simple spell."

"You've given this a lot of thought..."

"I was more running it past you to see if it would be something you're interested in?"

"...?"

"..."

"... Oh! You mean...? Right. I don't know."

"It's just that Ginny said you're bi, and we've had sex, so maybe you'd give it a go?"

"I mean... I don't see why not. Worth a shot?"

"Ginny already said yes, obviously. She's finding it hard to do much of anything with Harry these days, and I think she's craving a proper cock."

"And Harry's okay with this?"

"No idea. That's not really our problem now, is it?"

"I suppose not, no."

*** A couple of days later ***

Hermione and Luna were walking one afternoon down the corridor between classes, passing through swathes of other students all travelling in a chaotic stream of robes and chit-chat. Upon turning a corner to a much quieter hallway, Luna took Hermione's hand and pulled her into a disused classroom.

"Luna, wha-"

"Shh! I need to show you something!" She stood in front of Hermione, and lifted the front of her skirt - revealing a long, thick cock dangling between her legs.

"Oh my god! Luna!"

"None of my underwear would fit."

"What if someone sees?"

"Masking charm."

"Or feels?"

"I'm a weird nerd."

"Point. I can't believe you did it! Does it... work...?"

"So far. I've used it to pee and it gets hard when I'm aroused."

"You haven't...?"

"I wanted to try it with you."

Hermione felt herself getting wet as she imagined Luna sliding in and out of her. Unable to peel her eyes away, she replied:

"Um, yeah - definitely! I can't wait for tonight!"

"I meant now."

"What do you mean? We'll be late!"

Luna's cock began to harden as she thought about penetrating her friend, and feeling her pussy squeeze every drop of cum from her. Pulling her skirt down and stepping out of it before it became a logistical challenge, Luna and her rapidly stiffening shaft advanced on a flushed, definitely aroused Hermione.

"Kiss me!"

"Luna-!"

Taking her partner by the head, she forced a long, deep kiss - the initial resistance quickly falling away. Breaking away for air, Luna placed a hand under Hermione's skirt and felt her damp spot, massaging the nerve endings underneath.

"Do you want to?"

"Yes please!"

"Then turn around and bend over the desk!"

"Wha-?"

"Do as you're told!"

Even more aroused by Luna's forcefulness, she did as instructed, bending forwards over the wooden desk, sticking her round arse back at her friend. Pulling Hermione's skirt up onto her back, and pulling her white cotton panties down her to knees, Luna stroked her fully-erect, 6-inch penis and pressed it gently against Hermione's soaking entrance.

"Have you ever been fucked before?"

"No."

"This is a first for both of us." And she began thrusting forwards, inching in and out so they could both adjust, but soon she had worked her way all the way in.

"This feels amazing, I'm so close to cumming already!"

"I like it..."

Moving slowly out, then in, Luna felt a new experience: a tightening in her balls.

"Uh-uhhhh... no no no! Ughhhhh!" A warmth extended along her shaft, and she felt her cock twinge as she experience her first orgasm inside Hermione.

"Um, Luna? It feels really warm, what happened?"

"Uhhhm... I'm so sorry, Hermione." She pulled her sensitive, cum-covered cock out. "I just came."

"Already?"

"I know, it felt so good, I didn't have a choice. I'm sorry."

"It's all good, you can always use the recovery charm."

"Okay. Did you like it though?"

"Yeah, it'll just take some practice."

Pointing her wand at her cock, she immediately felt reinvigorated and gently plunged back into Hermione, causing a whimper and them both to relax into each other. Beginning thrusting again, this time with more control, Luna massaged her own breasts, and instructed Hermione to touch herself if she wanted. She immediately obliged, moaning as she was stimulated inside and out. A couple of minutes passed before Luna announced by way of grunting and twitching the arrival of another sticky load inside Hermione's pussy. Brought closer to her own climax by the feeling of being filled with cum, Hermione begged Luna to try once more so that they could cum together. More than happy to do so, Luna again pointed her wand and began thrusting, though this time more slowly.

"Please fuck me faster, I love the feeling of you cumming inside me!"

"It's so sensitive! I don't think this recovery charm works infinitely..."

"I just want your cum in me, fuck me faster!"

"You're getting slutty!"
"You've already cum twice, I need to cum too! We haven't had sex in days!"

Luna picked up the pace, struggling not to climax again immediately. Hermione rubbed large circles around her clit, enjoying the sensation of a real cock thrusting in and out of her. Before too long, Hermione's pussy clenched around Luna's cock as the brunette moaned in ecstasy, trembling as she came on Luna's staff, struggling to remain standing. The sight and feeling of the slutty whore orgasming so freely on her cock was too much for Luna and she felt her balls tighten for a third time. The tip of her penis became overly sensitive and she fired a final shot, balls-deep in her friend.

Pulling out, thick strands of their joint cum bridging their parts, Luna exhaled forcefully, holding Hermione by the waist.

"Was that good, 'mione?"

"Oh... yeah..."

"I'm glad!"

"I love your cock..."

"Me too." She giggled.

"I love feeling full of your cum..." She slowly, gently rubbed around her pussy, spreading a layer of lube all over.

"Well then, I think I'll confiscate these!" Luna pulled Hermione's knickers all the way down and took them. "And you're not allowed to clean up. I want my cum to slowly drip down your legs while you think about doing that again later. And if I check your pussy later, and it's not still full of my cum, there'll be no orgasm for you for a week. Do you understand?"

Already aroused again, Hermione replied:

"I understand."

Luna pulled her own skirt back on, hiding her retreating erection, and the two girls made their way to class, pink and slightly dazed.