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Side Effects May Include:

Summary:

Increased or decreased libido, possible erectile dysfunction, breast growth and breast pain, diuresis, and body fat redistribution.
Check with your doctor to see if spironolactone, estradiol, and progesterone are right for you! Or just buy it online! I'm not a cop!

...

Actually I'm fetishizing MY experience,

Notes:

This may or may not have been inspired by something shinonononomes said. Hi Shea!

(See the end of the work for more notes.)

Chapter 1: breast pain, lactation

Notes:

Fun Fact: Your doctor probably won't mention lactation to you as a side effect, so sometimes you get a fun surprise when your breasts start growing. I don't miss a lot about early HRT, but I do miss her.

(See the end of the chapter for more notes.)

Chapter Text

It's early. Early enough that the sun still hasn't risen, that birdsong has yet to break the silent sanctity of Kanade's childhood home.

Yes, it's quiet, save for the room just down the hall from Kanade's. Muttered words, the occasional giggle, and the dull smack of kisses punctuate the comfortable quiet. The frequency and volume gradually rise until a loud gasp pierces the night.

Ena rolls on top of Mizuki, relishing her whimpers as she sucks a hickey into her neck. There's something so irresistible about seducing a girl on her own bed and luring such pretty, pathetic noises out of her throat. It charges her with an electric high, one that she can only feed with more of Mizuki's sounds.

Hopefully, the noise canceling in Kanade's headphones is doing its job. She'd hate to interrupt her flow while fucking Mizuki silly.

She traces her hands over Mizuki’s naked body. Her back, her sides, her breasts— until Mizuki jerks, crying out in pain.

Shit. She snaps her hands back as Mizuki goes to cover her boobs. “You okay?”

"A-ah, yeah. Sorry, they've just been aching a lot recently." Mizuki gives a small smile. "They're really starting to come in now."

Oh, so this is, like, a transition thing. "It hurts? Do you want to stop?"

"Mm-m," Mizuki hums, shaking her head. "I just… Carefully, I guess?" She slowly removes her hands from her tits, baring them for Ena. "Take it slow?"

Ena licks her lips. “I could take a page from Mafuyu’s nursing textbook and kiss it better?” It sounded more clever in her head, but Mizuki giggling and wiggling underneath her is reward enough.

“You can try~” Mizuki chirps.

Happy that they've salvaged the mood, Ena leans in, brushing her bangs aside. She stays chaste for the first minute or so, peppering little kisses over Mizuki’s chest and admiring the new softness, but it’s not long before she starts using her tongue. 

Mizuki’s breath hitches at the first hint of wetness. She lets out a needy little whine when Ena starts sucking another hickey a couple inches below her collarbone. 

Ena takes that as her cue to tease, releasing with a pop. “Better?”

Mizuki blinks, clearly taking a second to let her brain catch up. “Uh, ahahah, I’m not sure that worked. Maybe you should do it a little more~?”

Pfft, okay. Well, if Mizuki’s playing dumb, she can too. "Oh no! Would a massage help?”

Mizuki giggles, giddy and breathless. "I don’t know, maybe~?" She takes Ena by the wrists and tugs them back to her breasts. "You should try it, just in case."

Ena leans in and pecks her lips before picking back up with her hands, kneading her tender buds and tweaking her teats. Mizuki moans deep in her throat, squirming in pain and pleasure.

"It doesn't hurt anymore," Mizuki croons, leaning into her touch. "Think it's actually helping."

"Don't the girls in your anime do this to get each other's boobs to grow?"

Mizuki snorts. "Shut up."

After a little while, Ena notices her fingertips come up damp. She pauses and examines the wetness. It doesn't exactly feel like sweat. It smells a little… creamy? "... Are your tits leaking?"

When Mizuki regains her faculties, she smiles sheepishly. "Uh... I maybe... kind of... started lactating. Just a little bit."

Ena cocks an eyebrow. "And you didn't tell us?" The thought of Mizuki… lactating now, apparently, stirs something deep within her. More importantly, though… "Is that something you need to see your doctor about?"

Mizuki’s shoulders raise up around her ears in a self-conscious shrug. "I don't think it's... bad? It feels kind of… good, actually. Like... I don't know. It makes the progress feel real." 

"Oh." 

So it feels good when her girlfriend lactates? 

… Huh.

Okay.

Cool.

"Is it an all-the-time thing?" Ena asks, trying to tame her curiosity, trying not to seem too interested. It's not like she's discovering a new fetish or anything. She's definitely not having some kind of awakening right now.

Mizuki's shoulders start to relax. "It's a little random, but it's not... all the time. It happens more if, um, if my boobs are being fondled, like now, or, um,” Mizuki's voice gets quieter, embarrassment coloring her cheeks, “I'm turned on…”

"... Like now?" Ena smirks. She squeezes a bit just to see if that garners a reaction.

Mizuki presses her legs together, giggling nervously. “That’s, um, that’s a secret, actually!” Despite dodging the question, her blush is starting to inch down her neck, which tells Ena all she needs to know.

"Mizuki~" she whispers in her ear, circling her damp nipples between thumb and forefinger, "Do you want me to… milk you?"

Mizuki squeaks and looks away. After a beat, though, she nods. Ena smiles in satisfaction.

Ena starts back up with her “massage,” groping Mizuki’s chest and pinching her nipples, rubbing them to try and coax out more liquid. 

Oh, kissing got Mizuki excited in the first place, right? 

Ena leans back in for another, deeper kiss, taking the time to appreciate Mizuki’s soft lips and tongue. Mizuki melts into it, letting Ena have her way with her mouth, only pushing back enough to keep the pressure up.

Mizuki's moans die down, replaced by soft, steady breathing. Her muscles relax completely, and when Ena breaks the kiss, she finds Mizuki's eyes half-lidded and unfocused. 

What did she do to deserve such a beautiful girlfriend?

Mizuki whines, thin and nasally. "Ena, more…"

Oh, Ena was so hypnotized that her hands stopped moving. She resumes, trying not to feel embarrassed about losing pace. It’s not her fault that Mizuki looks so pretty, all flushed and unraveling under her… and she just happens to like using her mouth, okay?

… Actually, if she's milking Mizuki, she should keep using her mouth.

Ena leaves a trail of kisses and nips down from Mizuki's cheek to her torso, paying extra attention to the spots that make her squirm. The crook of her neck is as sensitive as ever, but her breath catches when Ena reaches her chest; clearly, she’s on the right path.

When she latches onto a nipple and sucks, Mizuki keens, rocking her hips. 

Oh, she really liked that, huh?

Ena can feel Mizuki’s clit hard against her thigh, dripping and needy. She slides her thigh higher between Mizuki’s, trying to give her something more substantial to grind against. Mizuki's thighs clamp around hers, holding her in place as she rocks and whines.

Ena lavishes her nipple with her tongue, stroking, circling, and pressing down, humming with delight when she’s rewarded with more milk. It’s lightly sweet, with a tinge of salt… maybe it's mixing with her sweat?

Normally, that would gross her out, but Ena finds she doesn't care.

She’s starting to feel pretty good herself; the wetness smearing between her thighs is hard to ignore, but she can't tear her hands away from Mizuki.

“Ena,” Mizuki mumbles feverishly, "Ena, Ena…"

"Hm?"

"I love you," she breathes. She finally lets go of the bedsheets, bringing her arms up to weakly drape them over Ena's shoulders. "I love you so much."

She's too fucking precious. 

Ena releases Mizuki's nipple to press their foreheads together, meeting her gaze with pure adoration. "I love you too, Mizuki."

Mizuki whines pathetically through her nose, sounding almost like she could cry. "I wan… I wan—"

“You wan? Woof woof?” Ena croons, more than a little patronizing. 

“Don' bully me," Mizuki sobs, "I wanna, I wanna cum…”

Ena is suddenly extremely aware of her heartbeat, pulsing through her chest— and now her pussy. “You need a little more, baby?” 

Mizuki nods, eyes screwed shut in concentration.

If she's this close from just her tits being played with, then how far can Ena push her? “I could milk your prostate too?” Ena offers, maybe just a touch too sweetly. 

Mizuki keens, nodding harder. She just loves to be threatened with a good time.

Ena doesn’t have the patience to leave Mizuki’s side for long. Luckily, past Ena prepared for this inevitability by putting a bottle of lube under the pillow. Thanks, past Ena!

She pulls it out and squirts its contents onto her left hand— she plans on absolutely ruining Mizuki, which might overexert her art hand. There are still assignments due this week, so offhand it is.

Mizuki eagerly spreads her legs, raising and angling her hips for Ena's easy access. Her hands have found something to do, kneading her breasts in Ena's stead. 

"E-eiEna!" She squeaks as Ena's fingers find and prep her entrance. "Cold, cold—"

"It'll warm up in a second. Just relax." Ena grumbles, pacifying her for the moment. Thankfully Mizuki is well-practiced, and it doesn't take long for her to loosen up with her fingers. She swallows one knuckle, then two, then a second finger in record time. "Let me know when I find it, okay?"

"M-Mhm." Mizuki's so focused on the sensations from her tits and ass that she can't open her eyes.

Ena can't help but watch enviously as small rivulets of milk dribble down her chest. That milk should be in her mouth. She focuses her fingers more intently as punishment.

Mizuki squeals and bucks her hips, stuttering out an attempt at Ena's name.

"Here, right?" Ena strokes the spot firmly to confirm.

"There! There, there, please don't stop—" Mizuki cuts herself off with a cry when Ena’s mouth resumes its ministrations, tracing her tongue from her navel back to her chest to lick the trails of milk clean. She devours, working her hand to the same rhythm as her tongue to keep the fountains flowing.

"Ena! I'm, I'm about to—"

Ena's free hand slides down to stroke the head of Mizuki's clit. "Go ahead, Mizuki. You can cum."

Given how wet Mizuki already is, it's not a surprise how quickly she falls apart after that. Mizuki clings to her, hands and legs and hole, squeezing her tight while her hips buck of their own volition. Her cum spurts out in thin waves matching the cadence of Ena's fingers. 

Mizuki's prostate orgasms are always messy and intense, so Ena soothes her through it as well as she can. She holds her so tight, kisses her chest over and over again as she spills all over herself.

Good thing they set down towels before they started.

Mizuki whimpers and limply tries to wiggle out of her arms, so Ena pulls her fingers free, wiping the dregs of lube on a towel. She strokes Mizuki’s hair, kissing her forehead.

“Was that good? You’re doing okay?”

A goofy smile makes its way onto Mizuki’s face, and she hums affirmatively. “Yeah. Sooooo good.” She lets out a cute little trill as she stretches, reminding Ena that she, personally, is still very, very turned on.

"Cool. Do you think you can give me a turn, or are you too tired?"

Mizuki shakes her head and makes grabby hands at her. “I think I can keep going. You wanna sit on my face?"

“Fuck yes.” She’s clambering up and over before she finishes speaking, nearly kneeing her girlfriend in the face in her excitement.

“He-hey, careful with the goods! That’s my money-maker~” Mizuki teases, sticking out her tongue.

Ena takes a firm hold of Mizuki's ponytail. "Then put it to work."

"Fuck," Mizuki whispers. "Yes, ma'am."

She leans in, gives her thighs a few smoldering, reverent kisses. Tugs her lower until Ena’s sure she’ll smother or crush her. And she finally opens her mouth and laps up her slit.

Ena throws her head back and groans. Fucking FINALLY. She grips the headboard and rides Mizuki’s face hard enough to make the bed creak. The hot-wet-firm of Mizuki’s tongue against her folds makes her chest heave and her thoughts scramble.

Mizuki gives a pleased hum as she digs her face in and ravishes her pussy. The vibrations wrack Ena’s body, and she can already feel the edge of orgasm creeping up. Did fucking Mizuki really turn her on this much? 

Maybe she should slow down— fuck, wait, no, she doesn’t have the patience to edge. She’s not even sure if Mizuki has enough wherewithal to edge her right now— fuckfuckfuck, she’s sucking her clit. Fuck. Oh, she’s going to cum so quickly. 

Ena’s breath comes fast and rough, sweat pours down her back, and she can’t think beyond chasing the coming high. Like she’s in fucking heat.

She pulls Mizuki’s ponytail, forcing her deeper as she rides her tongue, fast and shallow and right, there, there there right fucking there!

She spasms, her back arching. She's cumming; fuck, she's cumming. 

Mizuki helps pick up the slack when Ena physically can’t keep pace anymore, only brainlessly grinding against her mouth as she’s wracked with pleasure. 

She rides until the stimulation is almost painful, then lifts herself up unceremoniously. Time slows to a crawl as she drinks the image in— Mizuki's chest heaving from exertion, hair threatening to spill from the loose mess of her ponytail, strands of Ena's cum still connecting their lips. She's nothing less than divine.

Ena collapses on her side next to Mizuki and catches her own breath. It's cold like this, so she scoots back, pressing their skin together again. She just… just needs to close her eyes.

It feels like only a minute or two passes like that when Ena suddenly feels the cold swipe of an alcohol wipe on her thigh. She yelps. "Right now?!"

Mizuki pays her complaint no mind, continuing to clean. "I was like, two seconds from passing out, so if I don't do it now, it's not going to happen."

Ena sighs without any weight behind it. "You and your cleaning," she fondly pokes her girlfriend's cheek. Mizuki's already wiped away the mess she left there.

Mizuki pauses and looks a little sheepish. "I just… want us to be as safe as we can. No accidents."

Ena's heart warms and her chest flutters. This is one of the ways Mizuki loves. "Thank you," she mumbles, pecking her lips, "you're really considerate."

She helps Mizuki with the rest; towels in the laundry hamper, stray fluids scrubbed out, and sullied tissues thrown away. The cleaning pays off; the bed is nice and fresh to lay in, and they can snuggle up to each other without any worries.

“Hey,” Kanade announces her presence. She lingers at the doorway, rubbing her eyes. Just how long has she been standing there?

Mizuki turns to her, a blush dusting her cheeks. "Oh! Sorry, Kanade. Did we wake you up?" 

Kanade shakes her head. "Haven't slept yet. Just wanted to wait till you were done." She stumbles closer and climbs into bed between her lovers. She pulls up the covers and cuddles up under Mizuki's arm, holding back a yawn. 

Ena spoons Kanade in turn, running a hand through her hair. "Aw, hon, we wouldn't have made you wait if we knew." 

“No, I like hearing you two have sex,” Kanade mumbles sleepily, “you make such sweet music together.”

Mizuki hides how flustered she is with a pout. "Being cuter than me is illegal! I sentence you to one big smooch." She kisses Kanade's forehead with an exaggerated 'mwah!' and smiles. "Love you, angel."

Kanade's already lightly snoring, unable to reply, so Ena reaches across her. She takes Mizuki's hand and kisses her fingers. "Love you, baby."

Mizuki, her coy kitten, tucks her chin behind Kanade. "Love you too…" Sweet thing…

Ena laces their fingers together, a way of saying she loves her and she's not going anywhere. Together, they settle in around their girlfriend, dozing off for sweet, soft, loving gay dreams.

Notes:

Mizuki stopped lactating only a few weeks later. Later, her partners will help her induce lactation with a combination of stimulation and Metoclopramide, a hormone drug used for that exact purpose.