This is crossposted from Ao3, If you have some ideas please don't be shy to share it, I would be really thankful with anything
this is an Ishigami x Shinomiya nsfw fanfic, read at your own risk
It has been three months ever since Shinomiya and Shirogane has started dating and as one would expect they've also done a lot of sweet cute couple things since then such as just looking and smiling at each other to going on a date secretly without anyone knowing.
Shinomiya laid at her ridiculously huge bed as she happily recalls about all the recent things they've done together and how giddy it makes her feel as butterfly flutter in her stomach, One of her favorite moments were the time Shirogane confess to her in the most amazing way she could think of. The amount of happiness she felt couldn't be described by mere words.
All the time before it where they try to outsmart each other to confess feels so silly now but are still precious memories she would never want to forget, that's the greatest time of her life that extends even now.
Shinomiya couldn't be more happier but... unfortunately, every good things will come to an end and this is no exception (atleast temporarily) as Shirogane's time of studying abroad is slowly but steadily coming closer and it's something that's really bugging her.
She does want to experience all the firsts she can do with him before that though and honestly it's going pretty well, they've done pretty much all couple things do except for one... SEX, she doesn't know how to go through this as initiating it might lead Shirogane into thinking that she's an indecent woman, on the other hand... She also doesn't have much time to wait for shirogane instead and that's not even the biggest issue here but the fact that she barely know anything about sexual education, of course she tried to ask Hayasaka about it but she's too embarrass to explain it to her, she also really can't trust Fujiwara and Iino will definitely not tell her so she's really out of choices except for one, she's not too sure about this but she's hopeful that nothing bad will happen (yep, definitely just good things)
Unbeknownst to Shinomiya, what she's about to do will be the greatest mistake she will ever do and something that will stay for the rest of her life
There in the student council room, Ishigami studies as Shinomiya personally teach him as they prepare for another upcoming exam, they don't usually do this in the student council room but instead in the library room but Shinomiya had recommended to do it here mentioning earlier that she wants to ask him a favor and so they needs some privacy.
The student council room is currently empty afterall as Shirogane went to plan and prepare a school event that will happen after the exam day, Iino is studying in the library and Chika is doing some club activities.
Ishigami is unsure of what to say, it's been 10 minutes since they finished studying but Shinomiya seems like she doesn't know what to say, at first he was kinda scared but as the minutes passed she started fidgeting bashfully which really calmed him down, he figured that she'll most likely ask him for some advice regarding president (Shirogane)
They hasn't really told about it yet but Ishigami already knew about it, they don't exactly hide it well and he's more than willing to help. "So what's is it you want to ask, Shinomiya-senpai" Ishigami said breaking the awkward silence.
Shinomiya was startled but calmed down after seeing Ishigami seriously waiting for her to speak.
"Ahm... This is kinda awkward but... I-l... just want to ask if you can teach me about s- se-sex" Shinomiya said stuttering being barely audible..."
Ah sorry Shinomiya-senpai, I think I misheard what you just said, would you mind saying it again"
"I said.. I wa... want to learn... About sex" Shinomiya said still stuttering but more audible than the last time, she cover her embarrassed reddened face.
"EH, WHY?" Ishigami unconsciously exclaimed out of shock.
"Sshhh, don't be too loud" Shinomiya panickedly warned him "No particular reason, I just want to know about it" she reasoned without having to reveal her relationship with Shirogane (she still red as a tomato)
"No, I mean why me! Can't you ask someone else" Ishigami quietly said as he's face also reddened as a tomato.
"Of course I tried but I can't trust Fujiwara and Iino would definitely not tell me so I figured might as well just ask you since we're studying anyway"
Shinomiya said as she starts to calm down thinking that this might not be bad as she thinks it is.
Ishigami starts to sweat thinking how bad this situation is, there's only two of them inside a closed room and she's he's best friend's supposed girlfriend asking him to teach her about sex.
Saying he's turned on is an understatement as he can feel his raging boner inside his pants and knowing that she's his best friend's girlfriend strangely makes it more arousing, he knows this is wrong but can anyone really blame him, he's just like any healthy highschool boy.
Of course, it's not like he'll actually do something to her, would he? He'll do this to help them and he definitely doesn't have ulterior motives, Ishigami thought to himself.
"S-so what do you want to learn, Shinomiya-senpai" Ishigami nervously asked her as he tries his hardest to resist the overwhelming temptation brewing inside of him.
"Oh thank you, Ishigami" Shinomiya said relieved that Ishigami accepted her embarrassing request, "I don't really know anything specific so I'm hoping you can explain it generally"
"Um well, where should I start?" Ishigami said sweating profusely as he immediately contemplates his action upon realizing just how bad Shinomiya's knowledge about sex is, he gulps before deciding to finally start with the simplest information he can think of, "Ahm, Sex usually starts with two people kissing" he said cringing with his awkward explanation
Meanwhile Shinomiya just sits there with her face reddened once again, Ishigami's raging boner immediately came back as he sees her glorious erotic widely shaped waist visible because of their school's tight black uniform.
"Ishigami? Hey Ishigami, are you okay? You suddenly space out" Shinomiya asked
" Ah... yeah, I'm fine Shinomiya-senpai but but I really don't think this is a good idea, it's awkward to explain it with words" Ishigami nervously blushes as he decides to back off, he just couldn't take the temptations anymore so this had to stop now.
"Eh? Wait, how would you explain it to me then" Shinomiya asked missing Ishigami's indirect way of saying his backing off, he had spent all of his resolved in trying to back off in which had failed comically so now his mind is full of nothing but overwhelming temptation that flows even through his rock hard cock. He gulps as he shoot his shot.
"M-maybe... Something like... Demonstration" Ishigami nervously suggested knowing full well that there will be no backing off this time, he's aroused like never before, there's just no way he can stop himself now.
"Eehhh? Demonstration? Like doing it ourselves?" Shinomiya exclaiming said as she reddened more than she already is. Yes, she did asked him to teach her but is this really okay? Shouldn't this only be between couples? And how about the "president (shirogane) being her first?"
"Well, it's not exactly the same as sex cause it'll just be like practicing" he said while surpressing his overwhelming lust and eagerness to fuck his best friend's girlfriend who is also his well respected senior.
"Well, if you say so" Shinomiya said with hesitance but still choosing to trust Ishigami, he isn't that type of guy and I'm sure of that, she said to herself.
Meanwhile Ishigami's cock is throbbing so hard that he can feel electrifying sensation throughout his whole body, he never would have imagine that a luck this big is even possible and here he is about to feast on Shinomiya's fit erotic body that no man has ever seen before.
"We need to get naked first to set up the mode" Ishigami calmly said with hidden excitement, he starts to slowly take off his tops one by one showing his surprisingly well built body that he worked hard on ever since the sports festival.
Meanwhile Shinomiya just stared at him as she's embarrassed to take her own clothes off, this is a first for her afterall and it's something she wants to experience with president only.
"Is something wrong? Shinomiya-senpai, did you change your mind" Ishigami asked after noticing she hasn't taken her clothes off yet
"Um No, I'm just readying myself" she said nervously before slowly taking her clothes off too, Her clothes fell to the ground and her body was then shown in it's full glory to someone other than her maid for the first time, she's wearing an innocent white lace underwear which perfectly compliments her glistening white skin.
Ishigami couldn't help but stare at her as he also slowly take off his pants revealing the big bump on his underwear that which ultimately caught Shinomiya's attention.
This will be her first time seeing a male's genital and it sure is way bigger than she imagined, is every guy really that big? Is president that big? (He's smaller).
Of course, Shinomiya's stare didn't went unnoticed as Ishigami is also looking at her with his eye filled lust, He smiled as he slowly take his underwear off watching inomiya's subconscious look of anticipation waiting to see his 8-inches long dick that no one has also seen before.
Ishigami let her stare at it for a few minutes before "So... Why don't we start with a blowjob, Shinomiya-senpai" Ishigami said snapping her out of her dazed mind.
"Ah what's a Blow... Job?" She asked with a confused look.
"You will just have to put my dick in your mouth and suck it" Ishigami said failing to hide his excitement as he sits on the sofa and prompt her to get closer.
Shinomiya stared at him suspiciously but still decided to trust him which unbeknownst to her is the effect of the lust that's slowly consuming her whole body, she knows deep down that this is wrong but her aroused pussy is pushing all the guilty feelings away with ease.
She kneeled Infront of him and is now just inches away from Ishigami's monstrously big dick, she then nervously took a deep breath which made her get a whiff of his dick's strong but titillating smell that gave her electrifying feeling throughout her whole body.
Ishigami release quiet pant as he feels her breath on his dick "please suck it now, Shinomiya-senpai" he begged with a cute reddened face that even made Shinomiya's heart skip a beat.
She then felt a sudden strong desire to suck his dick to see more of his cute expression, lowering her lips to his huge cock head. Placing them on his warm flesh, a shiver of excitement coursed through her at this meeting of her flesh and his. Her tongue reached forward to meet the tip of his dick, "oh fuck, Shinomiya-senpai, how are you so good at this"
His words sent another shiver of excitement running through Shinomiya's body as she continues to suck his humongous dick and desperately tries to put it all in her mouth.
"OH FUCK! SENPAI! I'M CUMING! I'M FUCKING CUMING!"
Shinomiya kept her lips around his shaft as she felt his cock shudder, just before a huge, thick, hot jet of cum erupted from his dick, spraying across her tonsils. Her eyes widened as she felt the force of Ishigami's ejaculation.
Huge thick jets of cum sprayed across the back of her throat. More and more erupted from Ishigami's dick, quickly filling her mouth with his warm seed. Shinomiya couldn't believe it as she felt her cheeks swell with cum; bulging with all the liquid in her mouth.
Finally, after what seemed like a solid five minutes (though it had probably been only one), a final jet of thick white gunk splashed in her mouth.
That was by far Ishigami's best orgasm he had ever had but what surprised him the most is the fact that his dick is still standing strong even after pumping out that much cum.
It looks like we're just getting started
