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Senku Ishigami x reader | Meeting him

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It was one lazy afternoon during weekends that you find it in yourself to visit the Ishigami household. Never had you thought you'll befriend the science geek when you've first met him at the school's laboratory, he was the type of student who ace almost everything with little to no regards on academic awards and certificates. "I learn them because I want to." He'd often phrase, he was busy mixing various potential chemicals when you stumbled upon him that one fated afternoon, too engrossed with his task to notice your figure walking in with caution. You have been tasked to bring the science club president to a meeting, such a simple task indeed, but the said club president has never attended every single meetings since he took the position.

'This elected president must be a lowly delinquent, it just so happens that the club was in dire need of someone to lead them.' You thought, brows furrowing lightly in displease, you were supposed to leave early today if it weren't for this dumb errand your professor assigned for you before you're fully dismissed for the day.

But then again, it's mostly the Science club president's fault. Whoever they are, and what they do, does not even concern you the slightest.

Speaking of, the president always stays longer than everyone else, that's how much you've known about them so far, so it wouldn't be hard to spot them.

"Excuse me?" You finally called out, the lone figure clad in lab gown paused for a moment before they lazily angled their head towards your direction.

Male, probably somewhere around your age if not older. His platinum hair was styled upwards with light green accentuating the tips of his locks before fading to dark gray. His eyes were sharp, pupils dyed in reddish shade.

The lack of interest etched across his face went unnoticed as you rely your mission at hand.

"I am tasked to fetch you for the student council meeting.."

As if on cue he turned back on his work. If he heard you he chose to ignore you completely, and if he doesn't, he must have a bad hearing. That's what you have managed to deduced so far.

This guy would be a complete jerk if it was the former, but before you could continue glaring daggers at his unsuspecting back you heard him speakㅡvoice in cool tone, and slightly low, one that you wouldn't expect he'd possess.

"Tell them I don't engage in such."

Your frown deepened, "I've been informed about your lack of participation in any meetings, but I am tasked strictly to ensure you'd attend this time." You rebute back, you barely know the guy but you can conclude he is definitely someone a little over his head. Maybe perks of being a club president?

He visibly sighs, a hunch burdening his shoulders lightly as he turned around, hand rubbing the back of his neck in a dismissive manner.

"Look, I appreciate your effort, honestly. But those annoying people knew I wouldn't come eitherway."

You stared at him, gauging any lies or hovering deception on his seemingly uninterested gesture. Finding complete absence of ulterior motives, you find yourself exhaling at the thought of your failed task. It was simple, awfully simple. You thought, heck, anyone could do this, what could possibly go wrong?

But fate just has other plans for you.

"We're you going to take long?"

"Huh?" He looks genuinely confused as he stared at you in a calculating manner,

"Your potions...stuff, I'll help you with it."

He stared at you for a moment before a low chuckle left his lips. If he's purely amused or he simply finds your curiosity humorous, you wouldn't know.

He pressed the heel of his palm against his temple before looking back at you again with a confident grin etched across his lips.

"Alright then, since you're pretty insistent." He gestures for you to come closer, his hands hovering over a ring stand, the lab burner flickering just below a flask containing a miniscule amount of odd green liquid. The color somehow reminded you of his ombre.

"Is that a biosolvent substance?" You muttered as you eyed the strange concoction,

His eyebrows perked up lightly before grinning at you once more, "Exactly. Ten billion points for you."

You couldn't fathom the unusual need to give you a score, but you couldn't care less, your mission is at stake here, so long as you managed to help him and finish his task faster, the better.

But that doesn't seemed to be the case.

ㅡ

"You should have seen my recent experiment when I mixed in the glycerol with nitric and sulphuric acid!" He grinned, an excited tone in his usually pensive voice.

"You tryna' bomb our school or something?"

He laughed, maniacally. You swore you can see him teetering over the edge between madness and sanity. "Nah... although it smells terribly sweet for something deadly." The scientist denied with a low chuckle,

"Like a burnt caramel."

"Exactly." he grins once more, before turning around to fetch his used test tubes and flask, he run them over the faucet before craning his head to look at the clock, confused your eyes went to flicker towards it as well.

5:45 PM.

"Ooop, my bad." He smirked, looking back at you in a pensive manner, "It seemed like we missed the meeting."

That seemingly mad scientist is now a friend of yours, who would have thought? Back then you wouldn't even spare the science club a glance, too busy brainstorming your next painting ideas, being a member of the club gave you endless access to tools, equipment and materials you'll need for your hobby.

It's one of the things you find the most joy in. So you couldn't find it in yourself to ask Senku about his seemingly unhealthy obsession towards Science either, because in all honesty? It somehow applied to you too. Just in a completely different font.

You rang the doorbell, once, twice, thrice.

Until it finally opened to reveal a groggy-looking Senku, his eyes were sunken a little, hair in disheveled mess, hinting at a possible all-nighter experiment he's so inclined to ever since.

"Good afternoon!" You greeted with a smile, as you welcome yourself in. As usual, it seems like his father wasn't around due to his line of work. But he always mentions you're welcome anytimeㅡmuch to his son's dismay that is.

A sigh was heard from the male as he shut the door close, "You're too loud, it's so early..." he grumbled under his breathe, hand coming up to ruffle his ombre locks even further. You scoffed,

"It's literally 2pm in the afternoon, dummy. Have you eaten yet?"

You walk towards his room, finding his usual messy set up normal, before situating yourself on his chair. Your eyes caught an empty cup of ramen by your foot and some empty energy drink. Frowning at the boy's lack of interest in sufficient nutrients, you went to grab your purse.

Senku who just happened to enter his room with a yawn, was yanked back outside, down to the stairs, and out they go.

ー

The male was seen crouching down as he attempt to catch his breathe, poor boy has a stamina of a high school girl. "Damn you, (Name)... at least let me breathe for a second. Ya' tryna kill me or something?" He wheezed, hand pressed against his chest as he glared at you menacingly, at least from what he could managed. From your point of view however, he looks stupidㅡlike an angry cat. You stiffle a laugh before grabbing him by his forearm, dragging him inside the ramen shop,

"Atleast feed that big brain of yours with proper nutrients!"

Maybe In A Different Age

Senku/fem reader

cw: angst no comfort (i tried) ik this fandom kinda dead lowkey but I wanted to write this cause its so senku coded. Senku's an idiot (unsuprisingly). Not very good writing.

wc: uhh i wrote this in my notes, around 1k probably

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Byakuya brings two strangers into their house on a random thursday.

"Senku, this is a close friend and her daughter, I'm sure you guys will get along splendidly."

"Ok."

Five year old Senku is harshly blunt when he meets you for the first time, staring at him silently as if you've never seen a human before. He doesn't have anything to say and it seems neither do you, so he walks off, deciding he has better things to do. Promptly ignoring the sigh and apology the older man lets out.

.

"So I got this new idea and I'm going through the basic logistics and research right now, might need your help later."

"I'll go get us some snacks and something to do while you work on it then."

Six year old Senku watches you dissappear from his doorway, absentmindedly humming while you head to the very familiar kitchen. Your family has been apparently busy as of late so he forcibly sees your face more often. You usually just eat his food, do your work, and ask him (dumb) questions. You're a friend now, he supposes.

.

"Hey dum dum, Byakuya got me new equipment, so I have some new ideas. So listen up."

"Course Senku!"

Seven year old Senku grins, you're always willing to help him out for whatever reason you have (something weird probably, in his opinion). In return, he always tells you what he's working on and his labor demands. So per usual, he excitedly gets into the details of the next project that he plans on working you and Taiju to the bone for.

.

"Hey Senku?"

"What?"

"I think I love you."

"Huh? You better not be catching feelings dum dum." He gives you a confused squint after hearing your words.

"Whatever you say." You hum

Eight year old Senku hears you say those three words for the first time, you don't say why and he doesn't know either. He thinks its rather idiotic, but he shrugs it off after you silently go back to reading. You've been picking up books more often as of late, not that he cares much.

.

"You're late for the test runs, Taiju and Yuzuriha already left."

"Sorry sorry! My teacher held me up a little later at practice today."

"Hm." His disappointed stare returns.

"Im sorry..? Love you?" You're sheepish with your response.

"How is that supposed to make up for anything? Now come help me carry this stuff"

"As you wish, princess Senku."

Nine year old Senku doesn't understand why you and Byakuya tell him that so often (or that stupid nickname sourced from his "feebleness"), but he moves on quickly to detail the results of the test and the numerous next steps. Much to his pleasure.

.

"Wake up stupid. You fell asleep." Senku (roughly) shakes you awake from your shoulders, poking at your face a few times.

"Huh? Oh sorry Senku, I guess I'm just tired."

"Well you're not gonna wanna miss this." He grins while looking up, expectant.

"Hm. Hey the moons pretty tonight yeah?"

"It looks the same as it always does. Is that poetry getting to you and making you sappy?"

You wait before responding, "Maybe."

Eleven year old Senku keeps you up on certain nights for his projects or for nights like these where there's a meteor shower. He thinks you should stop reading so much of those books that make you sound like Byakuya. You should also get more rest, he adds.

.

"Happy Valentines Day Senku!! Got you a gift, heh."

"Must I tell you again?" Senku turns to a usual sight, you waving a gift in front of his face as if he were a dog.

"I'm good I just wanted to remind you."

"Right."

Twelve year old Senku doesn't see the point in meaningless feelings or holidays for said feelings. Nevertheless, he takes the homemade chocolate from you, skimming through the card which contents include exactly what he expected (a confession of sorts, again), and placing it to the side. Ignoring it in favor of the much more sensible chemicals in front of him. Like every year though, Senku keeps it. He doesn't know why.

.

"Taiju and Yuzuriha definitely have something going on don't you think?"

"And you're bringing this up why?"

You pause, you know why, but you know he wouldn't understand. "It's cute... wish I could have something like that you know?"

"...For the last time-"

"I know I know Senku, don't worry I'll try to bother you less."

Thirteen year old Senku doesn't see you as much anymore, mostly because of your practice that your mom wants you to perfect. You come over less nowadays, a shame (for his projects obviously), but your presence isn't any smaller of an intrusion at school. So much for bothering him less.

.

Around 21:00 is when he hears the familiar ringing of his doorbell. "It's late, why are you here?"

"Got out of training not too long ago and wanted to see you before I headed in."

"Your house isn't even remotely close to mine" A raised eyebrow is all you get in response to your grin.

"What does it matter when I'm already here, but gotta go before I get scolded. Goodnight Senku, Love you!"

"You know it's never gonna happen, as you know-"

"Yeah yeah, 10 billion percent illogical, I know, but I can't let my favorite person forget can I?" You flash another smile.

"As if I'd ever with how often you say it, now goodnight."

Fourteen year old Senku closes the door after you've cheerfully said your bye and faded from his sight enough. The lack of noise is strange, now that Byakuya has "ascended like an angel" (his words not Senkus) it's much quieter. The usual noise of a certain two people is absent more often than not. He let's the silence of the house sit in.

.

"Hey, can you get me something from the storage real quick? Need it soon but that bonehead forgot when he came up here babbling about confessing to Yuzuriha"

"Of course. I'd do anything for you. Always here. You know that Sen."

Fifteen year old Senku glances at your fleeting figure. The nickname is new, for sure. And he can't say he dislikes it, but the lack of a certain three words with your departure is strange. He brushes it off to your usual forgetfulness and peers out the window at Taiju and Yuzuriha. Thoughts preoccupied until a bright green light overtakes his vision and he can't do anything but think into the void.

So he counts.

And maybe every once in a while you pop into his head like you always do.

.

Three-thousand and something year old Senku wakes up to a world where theres a lack of civilization, a lack of his decency, and most importantly, a lack of you.

You would be useful right now, he supposes.

.

Three-thousand and something year old Senku spends his free time trying to find you and the rest of the "gang" (as you would say).

He finds Taiju, he finds Yuzuriha, he also finds a lion-punching maniac, but there's no sign of you.

He's ten billion percent sure you survived.

Right?

The concerned stare Yuzuriha gives him as they part is ignored.

.

(Physically) Sixteen year old Senku celebrates this birthday gazing into the sky from his new observatory. It reminds him of a lot of things, but he can't help but notice how empty it is, it's eerily quiet.

He doesn't like it.

Senku wishes you were here.

His first real birthday wish.

.

(Still) Sixteen year old Senku breaks when he hears his father's voice again for the first time in ages. It's not his voice that gets to Senku. He's heard it plenty enough in his lifetime. It's the mention of you.

"Just kidding! I know it's you on the other side of this Senku! And ____'s there with you right? Please tell me you're dating already or even better married so I can have grandchildren. Please please please Senku! Although you can't really tell me that but-"

Senku stops himself from showing vulnerability in front of the village, and he also stops himself from pausing the record right there and then. Opting to sigh and curse his dad out as a cover up, his fist lightly punching the table.

"Damn you old man."

The questions from the villagers about who you could be are forgotten in favor of an angelic voice. Senku's quick to tune it out. It reminds him of you.

.

(Mentally) Sixteen year old Senku sits by himself that night. It's been a long day. The constant repeat of a certain melody in the background, more work for the science kingdom, and a few questions about who you were. They stopped after a few radio silences from him, feelings are hard for the scientist after all.

It's cold.

He wishes you were here.

It's dark.

He wishes you were here.

It's lonely.

He wishes you were here.

The day he can always guarantee you're there has long passed. You should be here, is what his mind tells him. You owe him for the past 3000 years of missed birthdays after all.

It's funny, in his opinion. That you were probably most-definitely always there. And the one (multiple actually, 10 billion in his mind) time he looks for you, you're not there.

He doesn't think its funny.

"I'd do anything for you huh..."

Anything but keep your word.

He scoffs, but it's directed at himself. He would never blame you for this, or anything for that matter, he can't.

So he sits. And he stays. Like you would've wanted him too. He looks at the clear sky like you usually do. And he notes how the moon is pretty tonight. Just like you.

"I love you too."

He's 10 billion percent sure he does.

-

Thanks for reading, if you did :). Sorry for any errors not fully proofread. Senku is so right person wrong time coded when it comes to romance that i had to write this even if its lowkey bad