Work Text:
presenting... smiskisworld kinktober smut!
week 3: bondage+69, senku ishigami
݁₊ ⊹ . ݁ ⟡ ݁ . ⊹ ₊ ݁. ──── ‧₊˚♪ 𝄞₊˚⊹ ──── ݁₊ ⊹ . ݁ ⟡ ݁ . ⊹ ₊ ݁.
#𝐃𝐀𝐑𝐋𝐈𝐍𝐆 𝐈, tyler the creator
❝𝐎𝐡, 𝐭𝐡𝐞𝐲 𝐰𝐚𝐧𝐧𝐚 𝐭𝐢𝐞 𝐦𝐞 𝐝𝐨𝐰𝐧 𝐭𝐡𝐚𝐭 𝐛𝐨𝐧𝐝𝐚𝐠𝐞 𝐣𝐮𝐬𝐭 𝐦𝐢𝐠𝐡𝐭 𝐛𝐫𝐞𝐚𝐤
𝐈 𝐜𝐚𝐧'𝐭 𝐬𝐢𝐠𝐧 𝐭𝐡𝐞 𝐝𝐨𝐭𝐭𝐞𝐝 𝐥𝐢𝐧𝐞
𝐉𝐮𝐬𝐭 𝐡𝐨𝐰 𝐥𝐨𝐧𝐠 𝐢𝐬 𝐟𝐨𝐫𝐞𝐯𝐞𝐫? (𝐈𝐭'𝐬 𝐭𝐨𝐨 𝐥𝐨𝐧𝐠, 𝐚𝐡-𝐡𝐨𝐨)
𝐃𝐚𝐫𝐥𝐢𝐧𝐠, 𝐈 𝐤𝐞𝐞𝐩 (𝐤𝐞𝐞𝐩 𝐟𝐚𝐥𝐥𝐢𝐧𝐠 𝐢𝐧 𝐥𝐨𝐯𝐞)❞
݁₊ ⊹ . ݁ ⟡ ݁ . ⊹ ₊ ݁. ──── ‧₊˚♪ 𝄞₊˚⊹ ──── ݁₊ ⊹ . ݁ ⟡ ݁ . ⊹ ₊ ݁.
THE DAY HAD BEEN PERFECT—well, as perfect as it could get in the Stone World. The Kingdom of Science went all out for your birthday. Food, drinks, music, and even fireworks courtesy of Senku's genius. By the time you both finally stumbled back to your room, you were exhausted, happy, and more than ready to collapse into bed.
But waiting in the middle of your room was a box.
Senku blinked, scratching the back of his neck. "The hell? Did we invent Amazon while I wasn't looking?"
You picked up the note card taped to the top, reading aloud: "Have an exciting birthday night! ~Gen :D"
Your eyes flicked to Senku. He was frowning, but there was a hint of amusement tugging at his mouth. "That bastard..."
You both pried open the box—and froze.
Inside was... an entire set. Ropes, cuffs, blindfolds, silk ribbon, even a feather or two. Your face heated instantly. Senku just stared, lips parting in genuine shock for once.
Then the two of you looked at each other and burst out laughing, why did your best friend have to be such a pervert?
"Well," you said slowly, fingers brushing over the ropes, "that's... an idea."
Senku snorted. "Tch. Gen, that freak. Leave it to him to use your birthday to project his weird fantasies onto you."
But the image hit you suddenly—Senku, sprawled across your bed, wrists tied neatly with crimson ribbon, looking up at you with that stubborn smirk faltering into need. You bit your lip, heat pooling low in your stomach.
Senku noticed instantly. His eyes narrowed. "Oi. Don't look at me like that."
You grinned. "What if I want to try it? What if I want you tied up, just once?"
His flush was instant, painting high on his cheekbones. "...The hell kind of birthday gift is that for you?"
You stepped closer, tugging at his shirt collar playfully. "The kind where I get to unwrap you."
He groaned, dragging a hand down his face. "Shit. You're not gonna let this go, are you?"
A few minutes of whispered coaxing (and maybe a little kissing along his neck) and Senku finally gave in, muttering, "This is just a science experiment, yes."
⸻
He sat on the bed, shirt already discarded, glaring halfheartedly as you looped the silk rope around his wrists. His long fingers twitched but he didn't resist. In fact, the sharp inhale he made when you cinched the knot said a lot.
"You good?" you asked softly, brushing your thumb across his knuckles.
He rolled his eyes, but his voice came out lower, rougher. "Yeah. Keep going."
The more you bound him—the handcuffs binding his wrists above his head, the ribbon across his chest, the way you spread his legs with a quick knot to the bedframe—the more his usual smug composure crumbled. By the time you straddled him, Senku looked absolutely wrecked and you hadn't even touched him properly yet.
"Damn..." you breathed, taking in the sight. "Gen might've been onto something."
He gave a shaky laugh, tugging uselessly at the restraints. "Don't let him hear that. I'll never live it down."
Then you kissed him—deep, slow, until he melted against the bindings. His body arched, desperate for more, his usual snark reduced to muffled moans against your mouth. When you pulled back, Senku chased your lips, whining softly, the sound shooting straight to your core.
"Look at you," you teased, rolling your hips against his. "You're usually so in control... and now you're completely at my mercy."
His answering groan was nothing short of sinful. "Fuck. You're enjoying this way too much."
"Mm, maybe." You let your hand trail down his chest, nails grazing his skin until he shivered. "But you are too."
"Mm, maybe." He didn't deny it. Couldn't. Not when his body betrayed him, blood flowing down to his hardened cock, legs straining against the ropes, eyes glazed with a mix of defiance and need.
You leaned back down to ghost your lips over his, kissing ever so gently. You pulled back when he started to lean into it, denying him and drawing another whine from his throat.
Your hands rub up and down his slight frame, trailing softly over his abs. Your hips rolled and grind against his growing erection, prompting him to lift his pelvis and beg for you.
"Looks like you're enjoying it, didn't I have to beg you to do this?" You cooed as his needy cock rubbed against your soaked panties. His eyes rolled back, the friction your grinding provides teasing him.
"W-well this is just a combination of adrenaline and—," his scientific rant was cut off when you grabbed the gag lying on your bed and put it over his mouth.
Every time you had sex with him he'd always treat it like a science experiment, it never bothered you since you thought it was cute—but this time you just wanted to fuck without it turning into a lecture.
"No science this time." You continued to grind against him, leaning forward once more to nip and suck at his bottom lip.
"Ph-ulease!" Senkus whined, the sound muffled by the gag.
"Quiet now," you rubbed your hands up and down his chest, dragging your nails along his skin. You enjoyed the way it rises and falls with his eager breaths. A needy moan breaks through him as his crimson orbs roll back and a growl rumbles in his throat.
You smiled coyly and pull your panties to the side. You hear a sharp inhale as Senku's eyes widen in anticipation. Lowering your hips you lightly rub your wet slit along the head of his twitching cock. Another moan escaped him immediately and his back arched off the bed.
"Darling, be still now..." you purred.
Senku groaned and just lets his body rest into the sheets as you continue teasing him. Each time you let him inside you a little he bucked forward, just to have you pull away. You whispered in his ear, naughty words that sent his mind reeling and his heart hammering against his ribcage.
And when you finally sank down onto him, he lost it—head falling back, a loud, broken moan tearing from his throat. His hips jerked, trying to thrust up into you, but the bindings held him down. You set the pace, slow and deliberate, watching him unravel under you.
Slowly bouncing on his hardened cock, you leaned down to remove the gag so you could hear his needy voice again. "Now you can be as loud as you want— just no science."
"Okay, no science, my darling." He looked into your eyes, lips trembling, his warm breath hitting your face before you leaned down to suck on his neck.
Each roll of your hips had him cursing, begging, voice raw with need. "Gods—please, more—fuck, faster—"
You went back to kissing his swollen lips, swallowing his desperate sounds as you rode him harder. He tugged at the ropes until his wrists burned, but he couldn't stop moaning into your mouth, couldn't stop trembling beneath you as you pushed him closer and closer.
"Ah- I'm close, baby stop so I can pull out." He cried out, tears rolling down his cheeks.
Nodding, you slid out and sat on his chest, you quickly undid his handcuffs letting his hands be free to roam your body. Then you turned around, stroking his twitching cock in your hands. You licked his dripping flushed tip before putting it in your mouth, making him let out a loud whimper at the sudden sensation. You take him deeper inside your mouth, almost gagging on it, when you feel hands squeezing your thighs.
Senku has grabbed your thighs so your heat was now rubbing against his lips. With a few quick strokes of your clit, he begins making out with your cunt. He holds you down tighter, pressing your cunt right up close to his face. His tongue laves at your sensitive bundle of nerves, twirling around it, teasing it with tiny flitting motions and then overwhelming you with a harsh suck. You keep sucking his cock, hollowing your cheeks and rhythmically rising and falling. More needy whimpers fall from both your lips.
The two of you were already close so it was only a matter of time before you'd come undone. When he finally came, it was with a strangled cry, body arching helplessly against the restraints. His whole body shakes as he shoots ropes of white into your mouth, and you swallow. You followed quickly after, your juices dripping down his chin as you moan loudly before collapsing against his chest, both of you trembling and breathless.
⸻
Later, after you'd untied him and got cleaned up, Senku buried his face in your shoulder, hair tickling your cheek.
"Happy birthday, darling," he muttered, voice still hoarse.
You giggled, kissing the top of his head. "Best present ever."
He groaned. "Yeah, yeah. But don't you dare let Gen find out he was right."
"Darling I—"
"Love you, right? Me too, happy birthday." He smiled before gently kissing your cheek.
݁₊ ⊹ . ݁ ⟡ ݁ . ⊹ ₊ ݁. ──── ‧₊˚♪ 𝄞₊˚⊹ ──── ݁₊ ⊹ . ݁ ⟡ ݁ . ⊹ ₊ ݁.