Minerva's grip on Hermione's wrists loosened and she completely let go of her as she straightened up, took a step back and let her gaze wander slowly and searchingly over Hermione's body.

Although fully clothed, Hermione felt completely naked under the piercing gaze of those green eyes that seemed to be undressing her - piece by piece.

Hermione's breathing quickened at the thought of being slowly and leisurely undressed by the tall woman in front of her. She could almost feel Minerva's long and delicate fingers on her, ceremoniously removing each piece of clothing from her body to take possession of the bare skin that lay underneath and so longed for her touch.

But instead of touching her and doing exactly what Hermione had just imagined, Minerva pulled out her wand and pointed it at Hermione, who couldn't suppress a brief nervous flinch.

She had already seen many times what powers this wand could unleash in the hands of the Scottish woman, who was not without reason considered the most powerful witch in all of Great Britain. She had seen her use it to perform the most complex transformation spells with just a flick of her wrist, transforming an object into something completely new, even creating something new. But alongside this creative power, Hermione had also seen the destructive force that Minerva McGonagall could unleash when her world and those who lived in it were threatened.

Cold fear gripped her as she remembered the last battle they had fought against Lord Voldemort and his followers so many years ago, and with which ice-cold precision the headmistress of Hogwarts had acted against the dark forces. No Death Eater had a chance that day against the fighting skills of this woman, who, even back then dressed entirely in black, attacked her enemies like an avenging angel and radiated a lightness and elegance that were just proof of how powerful Minerva actually was.

Hermione couldn't imagine what it would take for Minerva McGonagall to break a sweat. It was both frightening and exhilarating that she was now on the other end of the wand whose owner had the power to destroy her.

Oh and how she wanted to be destroyed by her. She wanted this powerful witch to take and take and take everything from her until there would be nothing left of her. The need to completely surrender to this power was the only thing that flowed through Hermione as she looked up at the woman, now dressed in black again, who still had her wand pointed at her. But instead of the scowl with which she met her enemies in battle, Hermione only saw unbridled lust blazing in the green eyes that fixed her hazel ones, and she knew without a doubt that Minerva would never turn her magical powers against her.

"You clearly can't show up for detention like this, Miss Granger."

With an elegant flick of her wrist, the black-haired witch waved her wand and murmured a few words that Hermione didn't understand, and the younger woman immediately sensed what Minerva had intended. She blushed brightly as she looked down at herself.

The Transfiguration master had changed her clothing. Where before her black trousers and a blue blouse had covered her body, she was now wearing...her old school uniform: a light gray pleated skirt that went down to her knees and revealed her bare legs, which were still in her black ankle boots, a dark gray sweater with the Hogwarts crest embroidered on the chest and red and gold stripes on the bottom hem and collar. The same colors of Gryffindor house adorned the tie that was tucked under the sweater and hanging from a white blouse around Hermione's neck.

Hermione looked up at Minerva in shock and wondered for the first time if she wasn't the only witch in this room, living out a teacher-student fantasy that had been in her head for a long time. But Minerva pursed her lips slightly in dissatisfaction, as if the new outfit wasn't quite what she had in mind.

"No, this won't do."

Again her wand made a movement in the air, this time more snappy and impatient, directed at different parts of Hermione's uniform and with each movement the garments changed until Minerva contentedly put her wand away and let her eyes wander appreciatively over Hermione's body.

The younger woman didn't have to look down to know what the headmistress had just done and her breath caught in her throat at the thought of what Minerva could now see of her. She had shortened the skirt by a few centimeters so that it now reached mid-thigh, while the sweater was completely gone, which Hermione was actually grateful for given the heat that was rising within her.

What made her blush bright red, however, was the blouse, which had previously hung loosely around her upper body and was now hugging her breasts and stomach skin-tight, the top buttons undone so that the black-haired woman in front of her would definitely got a taste of what was to come by looking at her cleavage.

Hermione felt the white blouse tense as she took a deep breath, and froze mid-movement as she sensed what else Minerva had changed, or rather, what she had removed. Her nipples were in direct contact with the white material, rubbing against it with each of Hermione's breaths. She could feel her nipples hardening from just this light contact, whimpering softly and desperately seeking Minerva's gaze.

Her green eyes sparkled insidiously as she walked towards Hermione, smiling, her gaze fixed on the younger woman's breasts, which she could definitely see through the white blouse, without any other material to shield Hermione's bust from the outside world. Hermione's heartbeat increased with every step the still fully clothed woman took towards her until she came to a stop in front of her and she felt like her heart would jump out of her chest if Minerva didn't finally touch her.

"Much better," Minerva whispered, reaching for the brown-haired witch's tie that still hung around her neck. She twisted the lower end around her elegant hand and pulled lightly, so that Hermione staggered forward and was able to brace herself with her hands on Minerva's shoulders just at the last moment to avoid colliding completely with the older woman and knocking her over in the process.

Another tug on Hermione's tie, which the former Hogwarts student obeyed willingly, caused her to tilt her head to the side, her throat completely exposed. She could feel her pulse there in her carotid artery, fluttering excitedly under her skin like a little bird. Minerva pounced on that very spot, wrapping her soft lips around it and sucking greedily, eliciting a deep gasp from Hermione.

Her fingers clawed at Minerva's shoulders and she was torn between the need to press herself even closer to Minerva and her instincts, which signaled to her with a violent tremor that ran through her body that such exposure with her exposed carotid artery could be life-threatening.

But even if Hermione had wanted to, she would've hardly been able to free herself from this position. Minerva still held her in place with her tight grip on Hermione's tie, like a naughty dog kept on a short leash. Her lower abdomen twitched violently as images of what Minerva could do with that tie flashed before her mind. Oh god.

The headmistress did not miss this twitch and Hermione felt the lips that were still sucking on her throat turn into a grin and reveal teeth that now sank into the area that she had just worked on with her lips and bit down.

Hermione screamed, but neither in fear nor in pain. Pure pleasure flowed through her veins and she had to grip Minerva's shoulders even harder to keep herself on her feet, which were becoming more and more wobbly.

Distracted by the bite on her neck, Hermione had not noticed how Minerva's other hand had moved down her side, her elegant fingers now gently stroking her nipple through the thin material of the white blouse. Hermione let out a deep moan that seemed to come from deep within her. Breathing heavily, she leaned her forehead against Minerva's strong shoulder and wondered how she was going to get through this evening when even the slightest touch from this impressive woman drove her to the edge of madness.

"Well, well, keep up, Miss Granger, we're just getting started. Follow me."

The headmistress pulled Hermione behind her by her tie to her desk and Hermione obediently followed her, no longer able to think clearly. She only consisted of pure pleasure that shot through her body like small lightning bolts and put every nerve fiber on alert. Her whole body screamed for Minerva's touch, her hands, her lips, on her, inside of her, everywhere, to finally release her from her torment.

Minerva pushed the desk chair aside to make room for Hermione, let go of the tie and breathed in Hermione's ear, "Lie down on the desk, Miss Granger. On your stomach, hands around the top edge of the table, hips against the bottom edge of the table…" Minerva had to suppress a sigh before giving the final command, which left her lips with a slight tremble: "…legs spread."

Hermione didn't hesitate for a second and got herself into exactly the position that Minerva had asked of her. The table was hard and cool beneath her, a welcome relief from how soft and hot she felt. She grasped the top edge of the table with both hands for support, eagerly anticipating that the headmistress wanted to thrust into her so hard that she deemed this measure necessary.

As she complied with the last wish of the Scottish witch, who now stood behind her, watching her every move like a hawk, and spread her legs, Hermione could feel how wet she already was. Her panties, which until recently had created at least a little friction between her legs while holding her legs together, were now stretching too and Hermione wanted to cry out in frustration. She had never felt such emptiness between her legs. She was open and wet and so unbearably empty and the desire to be filled to the limit was the only thing Hermione could think about. She had to use all her willpower not to cry and beg for mercy here and now.

She sucked in a startled breath as her skirt was pushed up with just one tug and she felt her butt exposed to the open air. She gripped the edge of the table tighter to brace herself for what was to come.

"Oh Miss Granger, what a beautiful sight you make," she heard Minerva speak behind her and the thought that Minerva now saw her like that, with her skirt pushed up, her buttocks exposed, her legs spread and certainly quite obviously damp panties only made her wetter.

She heard a rustle of fabric behind her as Minerva stepped closer to her.

"How many strokes do you think are appropriate for the countless dirty fantasies you have written about me in your little book?"

Hermione jumped as Minerva stroked her buttocks with one hand. Instinctively, she lifted her butt even higher to meet the hand whose light touch wasn't nearly enough. She wanted more. She needed more. But Minerva didn't do her the favor.

"Technically, you should get spanked until you can't walk anymore, but we want those legs to last a little longer than that, don't we? What do you think about 10 strokes to start with, hmm?"

But the headmistress didn't even wait for an answer from her former student, who was bent over on her desk, and struck. Firmly. Hard. Fast.

Hermione gasped when she felt the burning in her buttocks. However, she hardly had time to take a breath and recover from the pain, because the other blows followed immediately afterward in such rapid succession that Hermione found herself unable to breathe and only clung tighter to the edge of the table to avoid the hissing burn of her buttocks, which grew stronger with every stroke of Minerva's palm.

The sound of skin hitting skin seemed incredibly loud in the otherwise empty office. But as quickly as the attack had come upon her, it subsided suddenly. Her brain struggled to keep up with the rapid change. Her butt burned like fire. She was panting heavily. Almost indignant, she put one arm on the desk to turn around and had already raised her head when a strong hand placed itself between her shoulder blades and pushed her back down onto the table.

"God, Minerva!" she blurted. The pressure between her shoulder blades grew even stronger as Minerva leaned down, now resting almost all of her weight on Hermione. "Excuse me…?"

Hermione didn't understand. "…Miss Granger?" Hermione swallowed. "Sorry…Professor." The pressure on her back disappeared as Minerva stood up again. "Good girl."

"God," Hermione exclaimed as she immediately became even wetter at this praise and the painful throbbing in her buttocks suddenly faded into the background.

The need to turn around to see what the older woman was doing was almost indescribably huge. Not knowing what was happening behind her was driving Hermione crazy and her imagination was running wild.

She winced when she felt a hand caressing her calf and slowly circling her path further and further up, over the back of her knee and the back of her thighs, to the hem of her panties, which had never been such a big bother for Hermione until this moment and she almost wished that the headmistress had taken her panties along with her bra when she had transformed her clothes.

Minerva pushed her panties down her legs almost painfully slowly and Hermione could feel her labia tightening in hopeful anticipation of being able to enclose Minerva's fingers between them.

But then Hermione heard Minerva walking away from her. She could hear the fabric of her cloak sliding across the floor and the footsteps of her boots moving away from her. The desk chair squeaked slightly as the black-haired witch sat down on it. Was she seriously sitting right behind her and looking at Hermione lying completely naked on the table?

Before Hermione had even finished the thought, she heard Minerva's voice behind her, dripping with lust: "Mmmh, what a beautiful view, Miss Granger. It's a shame you can't see what I'm seeing right now. As you lie there on my desk. Your butt glowing red from the punishment you so bravely endured. Your legs spread so beautifully, presenting me with your little wet hole. God, you are so wet, your pussy lips are already shiny. Is that all for me? So exposed, so open, so wet. Are you already imagining me thrusting my fingers into you, over and over again, trying to get more wetness out of you, until you cum and cum and cum? Do you want me to fuck you, Miss Granger? Hard, fast and relentless? Just like you wrote in your little book?"

Hermione couldn't believe the obscenities that came out of the headmistress's mouth, which made her blush with embarrassment, but at the same time she knew that Minerva had touched a nerve in her and that was exactly what she wanted. Her lower abdomen knew this too and she felt her own wetness already running down the inside of her leg, she was so incredibly horny right now.

She whimpered and started talking quietly to herself to distract herself from how incredibly empty she still felt: "Oh God, oh God, oh God, please, please, please, I can't take this anymore. Please do whatever you want with me, do anything, I don't care, just please release me. I need this, I want this, I…" The rest of the sentence got stuck in her throat when suddenly three fingers dug into her and Minerva began to penetrate her at breakneck speed. So hard that her body pushed harder against the table she was lying on.

Hermione moaned loudly as all her senses exploded at the pace Minerva set. The fingers rubbing over and over again along her inner walls felt divine. "Oh. My. God. Yes. Oh. My God. Please. Don't. Stop", Hermione gasped through gritted teeth. The smacking sound that Minerva's thrusts made only turned her on even more. "So good, so good, so good, oh yes!" Hermione saw stars dancing in front of her closed eyes and knew that this orgasm would come quickly. Fast and hard. She was so close, so close. She concentrated entirely on the long fingers that pushed into her again and again, filling her completely and going deeper into her than anyone had ever done before.

And just when Hermione thought that no one had ever fucked her so well before, she felt Minerva's hand again, placing itself between her shoulder blades and pressing her against the table with her bodyweight, her other hand still thrusting firmly inside of her, twisting so that her thumb applied pressure to her clit with each thrust, and every muscle in Hermione's abdomen contracted with pleasure. "Cum for me, my good girl." Minerva's whispered words in her ear were all it took. Hermione screamed. She screamed out into the world everything that had been building up inside her over the last few weeks, months and years as she came harder than ever before in her life.