Chapter Text
Lysithea peeked through the doorway to the library, waving the small candle in her hand to illuminate the darkness of the night while cautiously looking around, hoping that she left her book on one of the nearby tables. Unfortunately for her, it looked like she'd need to be in there for longer than she wanted to if she was going to find it. She pulled back and propped the door open before cautiously stepping in, doing a quick lap around the library to make sure nobody and nothing else was around. During this, she saw that her book was nowhere to be seen on any of the tables, and so she sighed and decided, with great apprehension, that she'd need to take a look on the shelves.
Using her own memorization of the library's catalog, she quickly made her way to the most likely place for it to be, set down her candle, and got to browsing in the barely-illuminated darkness.
Byleth arrived at the library's door, only to find it open, to her surprise. She hadn't seen anyone making their way towards it, nobody even seemed to be awake this late. Even so, she walked in, hearing shuffling inside and entirely prepared for any possibility of danger. Out of the corner of her eye, she saw a figure, clearly outlined by their stark white hair and the faint glow of a candle that had been placed on the floor, quickly shuffling through the collection on the shelves in an obvious hurry. Immediately, it was obvious it was Lysithea.
Byleth walked towards the girl, her footsteps barely noticeable to Lysithea, who was intensely focused on finding her book, suspecting it had been put back on the shelves by mistake. She hadn't even noticed her professor appear next to her until she felt a hand on her shoulder and heard the young woman speak her name.
"Lysithea, what are you--"
Lysithea's soul jumped out of her skin as she screamed in terror, her brain refusing to register who was there. By instinct, she jumped back and shot a ball of fire straight at whoever was there. Byleth reacted instantly, quickly drawing the Sword of the Creator from the sheathe at her hip and blocking the magic, causing the blade to glow red hot.
Before Lysithea could even react, the momentum of her jump caused her to bang the back of her skull against a metal bar on one of the safety step ladders in the library. Lysithea's poor physical condition lent her to being knocked out easily, and this decisive strike did just that, causing the frail mage to fall limply to the ground, her body slung over a lower bar of the ladder.
Byleth quickly sheathed her sword, rushing over to Lysithea's side, pulling her head up and checking it for bleeding. When that wasn't present, she checked to make sure Lysithea was breathing, which she was, checking her pulse next, feeling it slow down gradually from the sudden pump of adrenaline. Byleth sighed in relief, propping Lysithea up, recovering the scattered book and candle, and lifting the girl back up into her arms, leaving the library.
Lysithea groaned, her eyes fluttering open and consciousness returning to her mind. Her eyes perceived the faint glow of magic in her periphery, and felt a hand supporting her head and holding it just a couple inches in the air. She was confused, still in a haze, but soon her senses returned to her as she looked up, the blurriness in her vision retreating as she perceived her professor leaning over her, one hand holding her head and glowing with magic while the other was placed gently on her chest, keeping Lysithea still.
"Professor?" She groggily asked, moving her body slightly.
"Stay still, Lysithea, I'm not done."
Doing as she asked, Lysithea simply leaned her head into Byleth's hand, feeling the warmth of her healing magic travel down her spine and diffuse out through her body.
"What happened?"
"You got startled and hit your head. Knocked you out cold. It's only been a few minutes, brought you here."
Lysithea glanced around, noticing she was in Byleth's room, on her bed. She didn't pay this much heed as she felt a certain splitting pain in her skull begin to subside, the muscles in her face relaxing somewhat as Byleth slowly laid her head down on a pillow before removing her hands from Lysithea, placing them in her lap.
Lysithea was grateful for Byleth's help, but an acute shame flushed her features.
"Apologies, professor, I can't believe I let my nerves get the better of me, and now you have to do this."
"Don't worry about it. You already told me you were scared of ghosts, I shouldn't have approached you as I did." Byleth replied matter-of-factly, leaving no room for Lysithea to disagree. "Are you feeling okay?"
"I'm not in pain, thanks to you, but I feel light-headed."
A barely-visible smirk formed on Byleth's lips as she stood up from her seat and quickly switched to sitting on the bed, facing Lysithea and removing her coat while doing so. "Your body is probably having some trouble getting your blood pumping again. Here, let me help." Byleth said turning her head away from Lysithea, who was briefly confused, but soon was rocked with shock as she felt Byleth's hands swiftly pull up her skirt and move to the hem of her blue pants, lifting up Lysithea's hips to pull them off, freeing the massive bulge that was once present in those cloth bindings.
"I noticed this while I was carrying you back. This should get your circulation going, right?" Byleth asked, uncharacteristically coy as she attempted to wrap her fingers around Lysithea's girth. She was undoubtedly packing, with a huge footlong futacock even while she was flaccid like this, and a pair of two huge balls, larger than grapefruits. Byleth's hand could only barely fit around by squeezing the soft member lightly before beginning to slowly move her grip across the whole length.
"P-Professor, what are you doing?!"
"I just said I'm helping your circulation, didn't I?"
"But, this is…"
"Is it not working? Would this help?" Byleth asked before moving her free hand and yanking down her top, pulling the fabric down over her huge tits that fiercely jiggled as they were released. Lysithea was speechless, a rare occurrence, as Byleth slipped her hand underneath Lysithea's back and sat her up, leaning forwards and squishing her massive knockers into Lysithea's contrastingly flat chest, her hand still stroking the young girl's cock, which began responding to the professor's touch as it hardened, just slightly, and a cloudy liquid began to spill from the tip.
"Very eager…" Byleth mused as she felt the precum slowly spill over hand.
Lysithea couldn't bring herself to debate with how her body felt, how Byleth's touch on her cock was already wracking her mind with crazed lust, but even so she was apprehensive, and couldn't help but think her professor was only doing this as a result of the unfortunate secondary effect of her crests. She glanced downwards at her balls, looking upon them in disdain.
"Professor, are you sure that you want to do this?"
"Don't worry about it, I want to do this for you, Lysithea."
"You can't be serious, professor!" Her breathing grew heavier and her face redder.
"Lysithea, you know of my life as a mercenary, right?"
"Y-Yes." She confirmed, feeling a sensation begin to well up in the base of her cock.
"Twenty-one years I lived with that mercenary band my dad ran. All of them men. Big, strong men that were well aware of me. I went through puberty around all of them, grew into my body with my 'fat fucking tits and ass' as they called them, saw them secretly look me up and down. Teasing them was fun, and yet none of them ever acted on that, because Jeralt was my dad. Look, fantasize, jerk off to me, but never, ever touch. That's how it was." Byleth picked up the pace of her jerking, causing Lysithea to tense up. "I have my needs, Lysithea, just like every girl here, just like you." Byleth leaned in closer, her face mere inches away from Lysithea's, so close she could feel her hot and heavy breaths. "Do you want to make a deal, Lysithea?"
"Wha… What kind of deal? Hng--!" Lysithea flinched when she felt Byleth stop her jerking to rub her fingers around the sensitive tip of Lysithea's cock, causing her hips to buck wildly, her semi-hard dick bouncing and spraying precum all over the bed as a result.
"I'll choke down your cock whenever you need me to, whenever you want it. I'll drink however much cum you can shoot, titfuck you until you're dry, take you all the way to the hilt, all of that, however much you desire."
"And what-- Oh fuck …" She exclaimed, her voice raising multiple pitches higher as she felt multiple, strong pulses and jerks from her cock as her balls tightened up, sloshing around her white hot cum. "What do you want from me?" She said, barely managing to hang on.
"I need to do some… convincing. I think the archbishop is hiding something from me. I need some help to… loosen her up. That's where you, and your huge cock come in."
"Y-You want me to rape Lady Rhea?!" Lysithea gasped out, barely managing to speak as her cock readied to explode, not even at full mast yet.
"Not rape, no. You will be fucking her brains out though, but Rhea's much the same as the girls here. She'd never be able to resist you once she sees your cock. I'm sure she'll be up to answer my questions if we get her addicted to you, only to take you away for a few days."
"Professor, I can't! That's-- Ghk!" Lysithea was about to object but suddenly felt Byleth's grip around her cock tighten as she began to squeeze it.
"You can't do it? That's a shame, I guess you'll have to stick with cumming into tissues and using your hands."
Lysithea was mortified, those words felt like they had immediately blue-balled her. She knew her hands never worked for getting her off, she knew that she's never managed to cum by masturbating. The prospect of having her unabashedly sexy professor and the gorgeous archbishop as her own personal cum dumps was almost too much to pass up.
And it was.
"F-Fine, I'll do it! Just please, let me cum!" She practically begged.
Byleth smiled slightly and moved back. She parted her monstrously huge pair of tits and slammed them together, wrapping them around Lysithea's fuckpole.
She didn't even need to move, Lysithea's brain went numb, momentarily forgetting all of the knowledge she had loaded it up with, its prime and only objective being to cum, cum , CUM . Her cock pulsed and thrashed as she tightened her kegel muscles, delaying the deluge for just a few moments, before the built up pressure in her still half-hard cock exploded.
"HHHNNNNNNGH--!!" Lysithea hissed through her teeth as cum rocketed from her base all the way through the over 2 foot long journey to come spraying out of her tip. Byleth pushed her tits closer together as she slid them up Lysithea's length, squeezing and siphoning out more jizz as she reached the tip, squishing her breasts together and keeping Lysithea's dick in place as her cock spurted massive rope after massive rope of cum. The pressure built up caused it to fire off high into the air in random directions, some of it splattered against Byleth's face and on her tits, while much of the rest splashed up onto Lysithea's stomach, chest, and face, smearing the young mage in her own semen.
Lysithea's body spasmed violently, her hips thrashing up and down to harshly fuck Byleth's titpussy, launching fat ropes of cum everywhere it possibly could.
Byleth plopped her lips around Lysithea's tip, causing the girl's deluge to flow straight into her mouth. Her eyes widened slightly and her cheeks bulged as cum immediately flooded her mouth and began forcing its way down her throat. Byleth swallowed to the best of her ability, allowing Lysithea's ungodly massive load to deposit itself straight into her stomach. Byleth moaned as she felt the white hot gunk settle in and fill up her gut, so much so to the point her belly began to bulge slightly as she consumed the remaining cum in Lysithea's orgasm.
Lysithea panted like a dog, her tongue hung from the side of her mouth and her half-lidded eyes were tired. The sensation of ejaculation died down from her cock as the remaining cum leftover slowly oozed out of her cock. Byleth removed her lips, but not without sucking down on the girl's cock and giving her tip a quick flick of her tongue beforehand, causing Lysithea to squirm.
Byleth looked upon her work, herself, her bed, and Lysithea, all plastered in virile girlcum.
And a grin crept up on her lips, as she began quickly moving her breasts once more.
She kept Lysithea's dick in a vice grip between her tits, and didn't intend to let it go any time soon as she began sliding her tits up and down Lysithea's fully-hard cock.
Lysithea arched her back as her hips bucked, roughly thrusting upwards into Byleth's cleavage.
"Professor, p-please stop, it's still s-sensitiv-- Ooohh!" She cried out as the sensation became too much to bear. Her hips thrusted upwards continually as the rest of her body squirmed, fiercely jostling Byleth around with the sheer weight of her cock. Lysithea's eyes began to slowly roll upwards, her mouth began to drool at the indescribable pleasure she was being assaulted with.
"P-Professor, it's… cumming again!" She hissed out as she felt her massive, weighty balls clench up once more, barely having recovered from the high of her last orgasm.
Lysithea's slit opened once more as a chaotic blast of cum came barrelling out of her cock like a shotgun blast, spraying everywhere in one massive explosion. A short pause, and yet another blast rocketed out, over and over.
Lysithea's cum splattered everywhere, drops and ropes of it flying in all different directions, staining even more of the bed, walls, carpet, and both Byleth and Lysithea herself.
Massive globs of cum began to spill out, a heavy SPLAT! sounding out as it splashed up on Byleth's face, causing her to recoil as her features were drowned in Lysithea's sperm.
Lysithea let go of her held breath as her orgasm died down, her small chest heaving heavily and her mind coming back down to earth from her high.
Byleth moved her hand to her face, doing the best she could to wipe the excessive amount of cum that laid upon it.
"That will be enough for today." The professor spoke, to receive no response from the exhausted Lysithea. "However, we're going to need to work on you before you can repay your debt to me." Byleth loosened her tits from Lysithea, and moved close to her ear. "You're going to be my alpha, and not a single woman here will be safe from your harem." She whispered, before patting Lysithea's chest lightly. "Sleep well." Was all Lysithea heard before her eyes fell shut.
plap plap plap...
Byleth groggily opened her eyes, awakened by an awkward feeling low in her abdomen and a light jostling of her body.
Her eyes fully opened in surprise as she heard a faint moaning behind her, and felt two thin arms wrapped around her waist. She let out a rough grunt as she shifted her weight, feeling the enormous length of Lysithea's monstrous shaft shoved deep inside her, stretching out her asshole and thrusting in and out as Lysithea moved her hips in a rhythm.
"Lysithea, you--" Byleth began, turning her head to look over her shoulders only to see that, despite her actions, Lysithea was fast asleep, breathing at a steady pace even as she continually shoved dozens of inches of cockmeat inside her professor. "O-Oh!" Byleth exclaimed uncharacteristically loudly as she felt her asshole invaded by even more of Lysithea's length. "F-Fuck…" She hissed out as she became fully conscious of how deeply Lysithea had invaded her body.
And of how fucking good it felt.
"O-OOOoooOOHHhhhhh~!" She screamed out as Lysithea's body thrusted particularly strongly. "Ah! Aahh~! Aaaahh~!" She cried out repeatedly as Lysithea unconsciously picked up her pace, forcing Byleth to lose her natural cool. "Fuck! Fuck! Fuck~! Fuck~! Fuck me harder!" She cursed, her voice rising higher and higher, her personality slowly slipping away into a complete, slutty addiction to Lysithea's pillar of a cock.
Lysithea's sleeping features twisted as her breathing quickly picked up as her body evidently reacted to the orgasmic sensation welling up inside her.
"P... Professor…" Lysithea unconsciously mumbled out.
"Wuh… Wait, you-- Ugh! A-AAAAahhh!" Byleth's noises were forced out of her mouth. "Augh! Ugh! F-Fuck! C-Cum! CUM!" She screamed.
Lysithea breathed in deep and sharp as her balls clenched a third time that night.
SSSCCHHHGLLOOOORRP~! came the gutteral sound of Lysithea's churning balls as her cock began to directly deposit her virile cum inside Byleth's well-fucked asshole.
"OOOOOUUUGUHHHH~!?" Came Byleth's final vocalization, her eyes crossed and tongue sticking out in a mindless ahegao as Lysithea's cum invaded her body, barrelling through until it began flowing into her stomach. She made a single, loud vocalization as she looked down after feeling an odd feeling, watching as her stomach bulged out, beginning to grow past her massive bust, growing to a point where she looked far past the point of nine months pregnancy.
Byleth's moaning got cut off as she felt a thick, heavy feeling well up in her chest and up through her throat.
"Ghk--! Hhk-- HEEEUUUGHHHH… " Byleth's cheeks bulged and her mouth was forced open as Lysithea's cum flowed up out of her throat, spilling and exploding out of her mouth, giant globs of it being launched out and hitting the floor of the room as streams of cum steadily flowing out of the sides of Byleth's mouth and spilling out onto herself and the bed beneath her. Even amidst this, she was able to form one coherent thought:
Byleth felt as the deluge concluded, her body twitching violently from the orgasms rattling it repeatedly.
"This might be easier than I thought…"
Byleth and Lysithea have reached support level C+!