My Hyper-Fixation Chronicles

F!reader x Sebastian Sallow; 18+; minors do not interact

Content warning: substance use (alcohol, potions, marijuana (aka mallowsweet, inspired by a fic I saw on ao3 by Antopops called Mallowsweet Muses)), non-consensual Garreth but nothing too intense, smut

I wanted to practice writing some more and got a little idea in my head about the MC going to a party and hooking up with Sebastian. Wanted to have it be a bit slice of life to make the Hogwarts Legacy universe feel a bit more lived in. Set in modern AU and there's really no plot, lol. Always happy for feedback on my writing! I'm very new to writing and do so for fun. I may come back and re-write this at some point but wanted to get it out there.

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You had been thinking about this all summer. Each year, the Slytherin house hosted an annual (unsanctioned) party to usher in the new school year before classes bogged everyone down with boring things like assignments and deadlines. This year’s party would be unforgettable, you promised yourself, and your chest fluttered in anticipation at seeing him. It was your last year at Hogwarts and you intended to make the most of it.

“I brought whiskey!” Imelda’s voice broke you from your thoughts and you turned to her with a grin. She sauntered into your dorm holding a bottle of firewhiskey which she presented to you proudly, the liquid within sloshing as she wiggled it in your direction. “We’re going to get you nice and drunk tonight so you can finally make a move. I’m tired of watching you and Sallow circle each other. It’s dreadfully dull at this point.”

“-and besides,” she continued, her lips twisting up into a familiar smirk, “Poppy and I have a bet going that I intend to win.”

A heat rose to your face and you rolled your eyes at her, snagging the proffered bottle from her grasp and taking a deep swig. The liquid burned as it went down and it bloomed within your chest, soothing the jitters it found there and filling you with a delicious warmth.

“Is this what you’re wearing tonight?” she looked you up and down thoughtfully.

“I had thought so, what do you think?” you asked, smoothing down the fabric of your slip dress.

“He’ll love it and would be a fool to think otherwise. Now hurry up and meet us in our spot. The party won’t really start for another hour and I intend to be drunk enough to stand the sight of you making moon eyes at him for the rest of the evening.”

You rolled your eyes at her as she left and returned to the mirror with a slight frown, retouching your makeup and darkening the kohl around your eyes. This would have to do.

The Slytherin common room was bustling with activity, and Lucan Brattelby was making some final touches to his soundboard and audio equipment. It was a marvel that he and a group of enterprising Ravenclaws had managed such a feat of magic, to ensure that the Muggle audio equipment would function properly within the walls of Hogwarts. He had taken to calling himself DJ Brat (a terrible name, all things considered), but the quality and selection of his music more than made up for it. He nodded to you absently in greeting, too busy with the finishing touches to spare you any further attention.

You exited the common room as the lights were dimming and the Slytherin prefects were casting lighting charms to make the space feel like a Muggle night club. You hurried down the hallways and popped out of a nearby exit, which led to a small alcove outside where Imelda and Poppy sat on stone benches, passing the bottle of firewhiskey and a mallosweet joint between themselves.

“Finally!” Imelda exclaimed as she spotted you, “Get over here and join us. We got bored waiting and started without you.”

“Hopefully you left some for me, you fiends,” you quipped, settling beside them and grabbing the mallowsweet. The joint was impeccably rolled- you would expect no less from Poppy- and the smoke filled your lungs, causing a sweet, buzzing sensation to fill you as the mallowsweet took effect.

“This is gorgeous, Poppy!” you marveled as you exhaled, and she giggled and clapped her hands together.

“It’s my newest strain. I worked on it over the summer. I cultivated it with you and Sebastian in mind. It should have minor aphrodisiac properties,” she paused and raised her hands defensively as you shot her a dirty look, “-but only a touch!”

Imelda grinned at her. “Those losers need all the help they can get.”

“I resent that comment and am choosing to preserve our friendship by having gone temporarily deaf.”

“You would perish without me, don’t delude yourself.”

Poppy interrupted the familiar bickering by shoving the joint in Imelda’s hands.

 “Oi, what are you lot up to?” a voice rang out, and you turned to see said object of unresolved affections and sexual tension languidly strolling towards the three of you. Poppy giggled into her hand and you shot her a quelling look which she conveniently ignored, taking a sip of firewhiskey.

“Hello, Sebastian,” you smiled and felt a faint heat rising along your neck. Your body was practically vibrating with the need to grab his dumb face and kiss him as he dropped into the space next to you, and you found yourself internally cursing Poppy for her ingenuity with recreational magical plants.

“Want some?” Imelda asked sweetly, passing the joint into Sebastian’s hands (hands which were currently causing your stomach to perform a series of backflips). He plucked it from her and took a hit, his eyes drifting shut as he leaned back against the stone wall and exhaled a plume of smoke.

You pointedly ignored the conspiratorial grin Poppy and Imelda were sharing by busying yourself with a sip of firewhiskey.

“Excited for the party tonight?” Sebastian asked, taking another hit before passing the joint over to you. Your hand brushed his fingertips as you reached for it, and your eyes shot up meeting his. His eyes had a dreamy and relaxed quality to them that you recognized from the many times you had gotten high together after class, but there was something more there. His gaze burned into you and with a blooming awareness, you realized that he was looking at you the same way he looked at forbidden tomes of magic snuck from the Restricted Section. Like something to be studied and devoured late at night, away from pyring eyes.

Imelda noisily coughed, which pulled you away from each other with a start, (Poppy was giggling again) and she snagged the joint from you. “Yes it’s shaping up to be fantastic, Sallow. Now shoo. We’re having girl time.”

Sebastian grinned and his eyes met yours again for a moment as he made his exit. “Whatever, Reyes. I can see when I’m not wanted. I’ll take my leave,” he paused in the doorway and turned to you for a moment, his gaze lingering, before he finally left.

“Well, I think we can call the mallowsweet a success! He couldn’t stop looking at you.”

“Shut it, Poppy” you groaned, closing your eyes and banging your head against the stone wall as you leaned backwards. “If he liked me so much he would have done something about it by now. Merlin knows that he’s had two years and countless opportunities.”

These two would be the death of you. If you didn’t implode with unresolved desire before that point.

By the time the three of you made it back to the common room, the party was in full swing. Dozens of students, at least, were crowded in the common room. You gently pushed past a cluster of Ravenclaw girls who were dancing near the entrance and made your way through the crowd. Music thumped and pulsed, the bass causing the stone floor to slightly vibrate, and the lighting charms cast an otherworldly purple glow in an otherwise dark room. Imelda and Poppy broke off from you to dance, and you squeezed Imelda’s hand as she turned from you and smiled at her, promising that you would join up with the two of them soon.

Further inside, there was a makeshift bar with a series of cauldrons laid out, each containing colorful mixtures. Some were bubbling and emitting plumes of smoke. You wrinkled your nose as you contemplated whether or not Garreth may have had a hand in creating any of them, and if he had, whether or not you were brave enough to take that risk. You stood by the bar a bit awkwardly, scanning the crowd of faces (looking for one in particular).  

As if he was summoned by your thoughts, Garreth stepped out from a cluster of Gryffindor boys (you easily recognized Leander Prewett by the decibel of his laughter) and stood beside you.

“Fancy meeting you here, my favorite Slytherin!” he slung his arm around you and smiled at you, his eyes wrinkling. He was handsome enough, you supposed, with his curling red hair and smattering of freckles. At least you understood why some of the others thought him fanciable. But after an awkward Hogsmeade date last year, you had gently let him down and had asked to remain friends. The spark wasn’t there, and you had been unable to stop imagining a different freckled boy the entire time you were with him. It wouldn’t have been fair to him to lead him on by agreeing to another date.

“Hi Garreth. How’s your night been so far?”

“Better now that you’re here. Hey listen- I saw Sallow just a bit ago looking cozy with that 6th year Slytherin, Beatrice Rowle. I didn’t realize they were so well acquainted- if you catch my meaning.” He seemed a tad smug as he said this, and you narrowed your eyes at him as you considered his words.

“Oh really…” you muttered under your breath. Your heart felt like it was falling out of your chest, and tears burned at the corners of your eyes as you tried to swallow your disappointment.

“-but hey, I’ve got just the thing to cheer you up,” he said brightly as he pulled a bottle out of his pocket and handed it to you. The bottle contained a pink, frothy liquid that seemed to sparkle, and you contemplated the risks and benefits of drinking it.

“What’s in it?” “One of my newest concoctions. It’s the perfect brew for a party like this. Will make you want to dance and will make everything feel incredible,” he elaborated, and took a sip of his own bottle to assuage your concerns.

With your thoughts turning again to the idea of Sebastian with another girl, you steeled your resolve and chugged it back. Garreth cheered and gave you a fist bump.

“Now you’re ready to party, my friend! To the best night of the year!”

“Cheers, Garreth.”

As you stood with him and watched the crowd of students, you felt the potion taking effect. The quality of the lights seemed to change before your eyes, the glow of the purple lights twinkling were so beautiful that you almost gasped in wonder as you took it in. You slowly spun around, your body humming in delight as the music pulsed and your hips swayed in time with the beat, the movement scratching an itch in your brain and the sensation of moving your body caused tingles of pleasure to course through your body.

“This is incredible!” laughter bubbled out of you as you twirled, and he laughed alongside you as you grabbed his hands and spun him around.

“Let’s go dance, then” he grinned and led you to the center of the room, where the music was loudest and the students packed the most densely. Bodies were pressing up against you from all sides and you laughed in delight as the song changed to a more upbeat house record. The rhythm of the bass thumping was easy to dance to, and you felt so much freedom as you just let go and allowed yourself to feel and move with the chatter in your brain fading into the background. Garreth pressed himself up against you from behind and you moved your hips against his. When you felt his hands move along your waist to grab your hips, your body paused its movement and a growing discomfort crept up your spine, the icy shock of discomfort dousing you. You turned your face away as he tried to kiss your neck, and his hands squeezed tighter.

“I don’t feel comfortable with this, Garreth” you murmured, your voice getting lost in the music. You weren’t sure if he heard you, and you were too afraid to look towards him out of fear that he would take that as an invitation to move further.

His lips found your ear and he breathed hotly, the warmth of his breath was oppressive and sent a shiver of disgust through you.

“Get off me!” you pushed him aside and he stumbled, his eyes wide and he held his hands up in a defensive posture.

Taking advantage of his confusion gave you a chance to push aside a dancing couple and escape the crowd. You found a small nook away from the chaos and leaned your head back to take a moment to breathe, your head spinning as you struggled to catch your breath. Tears flooded your vision and the glowing lights which previously looked so beautiful seemed to be mocking you. Taking in a few gasps of air, you were startled out of the swirling chaos in your mind by a warm hand on your shoulder. Your eyes shot up and made contact with Sebastian, whose face was pinched in concern as he watched you.

“S-Seb…” you gasped and his hand soothed you as he rubbed it over your shoulder.

“You okay, darling?”

You melted into him as you breathed in, taking in the warm, soft scent of charcoal and old books that permeated him, even amidst the multitude of bodies packed in the common room.

“I am now,” you offered him a small smile and he watched you with heavy lidded eyes.

“What happened?” “Garreth.. I’m fine now.” You felt him tense as he wrapped his arms around you and he rocked you gently. You felt him press his face into your hair and he whispered soothing words as he held you. You felt a small shiver pass through you and you looked up at him, a small smile playing across your lips. He looked at you, and you felt the world shift, as if the universe shivered and molded into a new path forward. And with little warning, his lips were on yours. You gasped into his mouth and his soft tongue soothed yours. His hands gripped your shoulders and then your waist, and you were lifted into the air, your back hitting the cold stone wall. Unbidden, your legs wrapped around his waist and his hands gripped your thighs holding you in place. He made a small noise of pleasure and groaned into your mouth, his lips pressing and molding into yours, a question. You gave him your answer with your own, pouring years of yearning and devotion into his mouth, which he lapped up greedily. You never realized kissing could feel so good.

Pausing, he pulled away and rested his forehead against yours. You looked at him and drank in the sight of warm, honey brown eyes and counted the constellations of freckles on his nose. His lips were slightly parted and soft, warm puffs of air fanned across your face.

“I’ve been waiting years to do that,” he admitted, a small, hesitant smile curling at his lips.

You frowned. “Why didn’t you?” “I was scared… Of the pain it would cause me to lose you. Even your friendship was enough. Until it wasn’t. I couldn’t take it anymore. I’m not brave like you are, but I was so afraid that I would miss my chance.”

You drank in his words as you stared at him. A small bloom of joy bubbled forth and you leaned in to kiss him again. His eyes were wide with wonder.

“You’ll never lose me,” you promised.

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A whirlwind of your bodies together, his hand in yours as he pulled you into his dorm. You memory was fragmented, as you were lost in the delirium of adrenaline and the mix of potions and liquor in your system.

The four-post bed as he all but slammed you onto the mattress. Soft sighs as your hand gripped into his tousled hair. It was soft and you delighted in the sensation of smoothing your hands through it, pulling through little knots and marveling at the color as you twisted strands of it around your fingers.

His lips on yours again and his eyes never leaving your face as he laved pleasure onto you, exploring the valleys of your curves with his hands.

An admission. “I’m obsessed with you.”

He vowed, a prayer on his lips in subjugation to you, “I will never go a day without ensuring that you know the depth of my devotion.”

“Let me worship you,” as he knelt between your legs and used his lips and his tongue to bring you to release. Once, twice, three times, and you lost count, your head spinning as you gripped onto his cheeks and traced circles into his face with your thumbs.

Pulling his tie off, your hands fumbling with the fabric in the dim light. And then his shirt and his pants. Your hands grasping for his cock as you sighed in relief, finally having it in your hands. You knelt before him and his eyes darkened with desire. Your lips wrapped around him and your tongue circling the tip, taking in the warmth and velvety softness. A small pause, his eyes searching yours. You beamed up at him, a smile stretching so much across your face your cheeks hurt.

“Do I have your consent, darling?” “Yes,” you breathed, and he finally entered you, his hips moving forward and you saw stars, lying back and staring up at him. The muscles of his abdomen were pronounced and you ran a hand over them, admiring the contours you found.

“More,” you urged him, and he complied.

You remember the ecstasy of the movement, as he slid in and out. His hands cupped on your ass as he held you up.

“Let me do the work, princess” he murmured, and with a final stroke inside you he came, letting out a soft groan in his release and stiffening up, his body rigid alongside yours.

You didn’t orgasm during this, and that’s fine too. You told him as much as he lay beside you, the two of you facing each other. He ran his hands over your face, his finger mapping your features as his eyes fluttered shut.