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thinking about isekai and how shinji is trying to help get shirou properly milked to ease her discomfort. he wants to be able to provide her with privacy — the flush to her cheeks and the way she bites at her bottom lip say everything. she’s holding back out of embarrassment. while that’s perfectly understandable, shinji wants to insist it isn’t necessary. 

it’s really not fair. shirou was the last of them to appear, so she never had the benefit of watching the others, shinji included, struggle with their own changes to their bodies. 

he tries his best to calm her; pressing their foreheads together and taking notice of the sweat collecting at her hairline and dripping down her face. she’s overheating and it just isn’t from emotional discomfort. could this sort of thing make her sick if not dealt with properly? signs seem to point to yes and that’s all shinji needs to see to know he needs to work quickly. 

he pushes knit fabric up and over her chest, feeling her tremble at the sensation of moving fabric and air touching her heated skin. her breathing is already coming out in labored puffs as shinji sternly surveys the situation. her breasts hang heavy — altering shirou’s posture as she bends to their newly accumulated weight. her nipples are notably puffy and swollen; milk beading slowly from them and streaking downward. shinji thinks he can hear a “please help” crowded within shirou’s panting and whimpering and it makes shinji’s heart twist itself into a knot. steeling himself, he gently lifts her breasts at their most generous and surveys their weight. shirou gasps at the contact, visibly trying to hold back a moan as she feels shinji’s fingers sink deep into her skin. despite the newly added pressure, there didn’t seem to be an increase in milk flow. come to think of it, he’s never seen hints or lactation in shirou before. this truly must be the first time. he gently works his fingers into her tits, testing the waters with increased pressure until he works his way to her nipples. they’re still stubbornly leaking in only a dribble despite being so thoroughly engorged. shinji’s jaw firmly sets as he begins to pull at her swollen nipples and flinch as shirou gasps and whines; her arms shaking as she tries to keep them still. his rarely used sense of empathy is shattering him, but he knows it’s for the best. he works her nipples with less gentleness than he would prefer, but the satisfaction of watching streams of milk pop from her as he returns to grasp and knead the underside of her tits was mesmerizing. 

it wasn’t long before both of their clothes were soaking, and judging by the size and weight of shirou’s breasts they weren’t close to being done. shinji’s thumbs spread further under her tits and all but roll against her soft skin as if to encourage the milk from the deepest part of her chest to come forward. shirou groans in a way that could only be described as erotic and his eyes glance downward to see that she is very much resisting touching herself. he very pointedly does not look at his own lap. shinji is more than aware of what’s going on down there. 

milk streams freely and soaks into skin and fabric in a way that’s very pleasing to watch. it shines on shinji’s fingers and palms and leaves glistening trails of down shirou’s soft, flushed abdomen. shes’s absolutely radiant in this moment; her body quivering with pleasure and relief as her throat struggles to swallow every sweet, pleased moan she’s too embarrassed to let out. 

shinji really wants to hear them, though. 
perhaps it’s unfair, but he twists his hands just slightly as if to wring milk from the stubborn parts of her and the surprise of it all frees her voice in an instant. it’s so cute; she’s so cute. shinji feels an avalanche of sensations and most of them dance around his swiftly increasing emotions for this rough and tumble boy turned soft, charming cow girl. 

shirou’s eyes are wet as she begs shinji in labored whimpers not to stop. he couldn’t even if he wanted to, with how forcefully it continues to stream as his fingers and palms flex and squeeze. his voice shoves through the lump in his throat to speak to her firmly; calmly. almost melodic words of praise fall out of his mouth in perfect time. gratuitous usage of “you’re doing so well” and “good girl, that’s it” are punctuated by shirou’s now unrestrained moans and cries, twisted somewhere between pain and pleasure. her tits feel lighter, shinji thinks, but that could mean the difficult part was still yet to come. 

with the struggling breaths that pushed past her lips, shinji could tell she was reason a physical limit. stroking her face with a milk soaked hand, he whispers gentle things. how beautiful she is; how they’re almost finished. he can see how tense her body is and completely out of raw impulse he gently pushes her backwards to lie down, only frowning as she winces under the reign of gravity against her impossibly sore tits. she looks exhausted, like she could drift off into an uncomfortable sleep and shinji momentarily wonders if that would be okay were it even possible. she groans softly under her breath and she adjusts her position and blinks owlishly as she finds shinji crawling over to join her. 

the fabric of his high-slitted tunic parts in a scandalous way as he positions himself over her, thick hips and everything that comes with it most certainly on display for shirou and anyone else who may walk in on them. shinji’s erection too, has become undeniably present, pressed into otherwise draped fabric. head fuzzy with the haze of overstimulation, shirou rightfully accepts it as a compliment. he’s never thought much in the way of touching a dick before, but had she the ability right now she would more than just consider it. there was a bit of mystery as to what all exactly was hiding beneath that tunic, but shirou has gotten quite good at handling surprises. 

a low growl rumbles in shinji’s throat as he straddles over shirou. she’s just as beautiful like this: vulnerable and undeniably aroused. he unconsciously licks his lips, thinking that he could get used to seeing her this way. 

shinji wastes little time getting back to work on shirou’s tits, reveling in the feeling of her back arching and squeezing their chests together, leaving them both panting and top of shinji’s clothing sopping wet and hanging loose and low. as their bodies rock into one another gently, shirou can catch a glimpse of shinji’s small breasts now and then, watching them jiggle with the repetitive motion. they’re cute enough to eat, shirou thinks, though she’s too overstimulated by her own tits to do anything about it right now. 

when the milk flow begins to decrease shinji examines the heft of shirou’s breasts in each hand. the soft whimpering tumbling from her lips is at a near constant now, and though he’s just about damn near wrung each of her tits dry, it’s obvious in the way shirou squirms beneath him that he isn’t quite finished. 

a sharp cry breaks the softness of their coupling as shinji tries to stimulate production from shirou’s nipples. they’ve become far too abused since this all began and with a twinge of guilt he acknowledges her pain with a firm nod. gently, he takes one of her breasts from its underside and leans down to take her nipple into his mouth. tounge pressing gently over swollen skin as if to apologize, he predicts the slight bucking of shirou’s hips against him as he begins to suck on her, fingers still sinking into the underside of her tit to encourage milk flow. 

shinji must have hit a sweet spot somewhere in his ministrations, because the burst of milk that filled his mouth suddenly wasn’t entirely expected. both he and shirou’s eyes had blown wide in a moment of mutual surprise and shirou couldn’t help but feel impressed at shinji steadfastly gulping it down. he relaxed his throat muscles and kept up as best he could, only stopping to breathe. shirou fondly admired him as milk rolled off his tongue as escaped the sides of his mouth, connecting at his chin and dripping onto shirou’s chest as she panted. as the breast in his hand slowly began to feel more like its normal size and weight, shinji dutifully switched to the other side and treated her just the same. long, gentle ministrations of the tongue in an attempt to soothe the necessary abuse from before. with the same rhythmic assistance of his hands on this breast, he’s greeted once again by an aggressive stream of milk filling his mouth. 

shirou shrieks in what can only be described as ecstasy, arching her body and stuffing shinji’s mouth completely with her tit. he takes it like a champ, still sucking while sticky sweet milk torrents into the back of his throat. he swallows eagerly; hungrily even as he relishes in the sensation of warmth collecting in his stomach. it was surprisingly quite good. heavy and rich with flavor unlike anything he’d ever tasted in either of his lives. it would be difficult to waste any of it in the future knowing this now. 

shinji starts to feel heavy limbed and sated, his legs wobbling a little as the warmth from his tummy spreads throughout his body and sends a light, tingling sensation rippling through his skin. with uncharacteristic clumsiness, shinji gentle flops to the side of shirou and fumbles under the fabric of his tunic for his dick. a few lazy strokes and his body goes taut and his hips jut against his wrist before he melts back into a more boneless state than he previously was. his mind is escaping him somehow. he tries to think clearly through half-lidded eyes but all he can think of is the feeling of shirou’s tit stuffed in his mouth and how she trembled underneath him. with some effort he rolls himself against her and lets his hand stroke across her bare stomach, her skin still warm and sticky with drying milk. 

he idly wonders if he’s having an out of body experience. surely having breastfed from his dear friend and likely something more wasn’t an activity typical of most people, but... shinji can’t say he would mind if it did become a regular occurrence between them. marbles in his mouth are very present when he tries to express his gratitude — technically he was the one doing the helping, but with how his body feels right now it feels as if a thanks is in order. his fingers tap against her skin with childish curiosity as he can feel himself slipping farther and farther into what can only be described as a warm, full body embrace. 

shinji felt full; almost uncomfortably so as rich liquid turned to lead in his stomach and dragged him until he was completely submerged. his eyes fluttered closed and soon were far too heavy to open as well. 


when shinji wakes up there’s still a vague heaviness to his limbs. he still feels full, but satisfied; comforted, even. looking up he can see shirou watching him and stroking her fingers through his hair. with his head in her lap he can’t help but acknowledge to himself how soft her thighs are and maybe how he would like to feel them wrapped around his waist one day. while his mouth still feels a bit slow. he’s coming to realize that he cannot recall a time that he’s ever felt this refreshed. 

instead of all of the other things he could say, shinji makes a comment about his view being choice. light cotton fabric of a cropped shirt barely covering her nipples has to be the most ideal for her current state of course, but the abundance of underboob could not go ignored and unappreciated. shirou presses her palm directly into shinji’s face with some level of amusement and shinji chuckles in response — an uncommon reaction from him. shirou blinks, tilting her head in the moment before sinking into a shy smile and a dusty shade of pink that suggests she liked hearing it. 

“thank you for your help.” she says curtly, eyes saying she’s still a little embarrassed, but her nervous smile saying she at least enjoyed some of it. clearing her throat, she pointedly breaks eye contact with a slight huff to her breath. 

“I don’t suppose if it happens again— “ it’s obvious she’s struggling a bit to get this out, so shinji interrupts. 

“Come to me. I’ll help you, always.” 

even with nothing but cotton between his ears shinji knows that something this special is an arrangement he would like to keep to himself. only he wants to see shirou that way, flushed and crying for him. he wants to drink from her again and feel his limbs get heavy from the pleasant warmth that radiates from the pit of his stomach. 

shirou was magic. 
shinji already knew that, but this was a fine development to add to her repertoire. 

he watches her tail swish back and forth, stimulated in a way that showcases shirou’s fluttering nerves and residual pleasure that’s sunken into her bones. her ears flick just enough to make him crack a smile and take one of her hands, lazily pressing his lips to her knuckles.