Pairing: nerdmin x reader
Synopsis: you’re the loud, outgoing president of the university anime club—always organizing events, hyping cosplay shoots, and dragging everyone into late-night chaos. nerd!Armin—quiet club treasurer, glasses-wearing Attack on Titan lore expert who blushes if anyone looks at him too long—has been secretly obsessed with you for months. after the filthy club room night, risky rooftop, sweet dorm morning, and desperate convention tent quickie, the long convention day finally ends. exhausted but still buzzing, you both stumble into the cheap hotel room the club booked for the night. Armin is still half-wearing his Eren cosplay (harness straps loose, green cloak draped over his shoulders, shirt half-unbuttoned), and the tension that’s been building all day explodes into a slow, exhausted, multi-round celebration where your pathetic, whimpery boyfriend finally gets to worship you properly again.
Content: nsfw, smut, mdni, slow & desperate multi-round sex, cosplay elements (Eren harness still on), fingering, nipple play, p in v, unprotected sex, creampie, missionary + riding + lazy doggy, subby pathetic armin, university au, hotel room after-con, lots of whimpering/begging/praise, detailed slow build-up, overstimulation, fluffy aftercare & cuddles, tired but needy vibes
──────────────── MDNI 18+ ────────────────
Part 5: Late-Night After-Con Hotel Room
The convention hall lights finally dim at 10 PM, and by the time you and Armin drag your tired bodies into the cheap double room the club booked on the 12th floor, both of you are running on pure adrenaline and leftover convention energy drinks.
The room is nothing fancy — two queen beds, a tiny desk, dim bedside lamps, and a window overlooking the city lights. But right now it feels like paradise.
Armin is still in most of his Eren cosplay. The green cloak is draped loosely over his shoulders, the brown vest is unbuttoned and hanging open, white shirt half-undone with several buttons missing from the chaotic day, and the signature harness straps still crisscross his chest and waist. His hair is a complete mess, lips slightly swollen from the quickie in the changing tent earlier, and there’s a faint hickey peeking from under his collar. He looks wrecked… and ridiculously hot.
You barely get the door locked before you’re on each other.
Armin drops the bag of leftover merch with a thud and pulls you against him, kissing you deep and slow, the kind of kiss that says he’s been thinking about this exact moment since the tent. His hands slide under your skirt immediately, squeezing your ass while he whimpers softly into your mouth.
“I’ve been hard for hours,” he confesses breathlessly between kisses, voice hoarse from talking all day. “Every time I looked at you today I remembered how you felt in the tent… how you let me cum inside you with all those people right outside…”
You push him backward until he sits on the edge of the bed. The green cloak pools around him like a cape. You climb into his lap, straddling his thighs, and grind down slowly on the very obvious bulge still straining his cosplay pants.
“Poor baby,” you coo, nipping at his bottom lip. “My needy nerd couldn’t stop thinking about filling me up again, huh?”
He nods frantically, glasses long gone (he switched back to them after the con), lenses already fogging up. “Please… I need you. I don’t even care how tired I am — I need to be inside you again.”
You take your time undressing each other, but you leave most of his Eren cosplay on. The harness stays strapped across his chest. The cloak stays draped over his shoulders. It makes him look like a desperate, fallen Survey Corps soldier who just survived the day and now only wants to worship you.
He lays you down on the bed first, crawling between your legs like he’s starving. He spends a long time between your thighs — tongue and two fingers working you open slowly while he whimpers praises against your pussy.
“You’re still so wet… still full of my cum from the tent… I can taste both of us… fuck, I love this so much…”
He makes you cum once on his tongue, thighs shaking around his head, before he finally crawls up and sinks into you in deep, slow missionary. The harness straps press against your chest as he rocks into you, face buried in your neck.
This round is exhausted but intense — long, lazy thrusts that drag against every perfect spot inside you. Armin’s whimpers are constant, soft and broken.
“Feels so good… even after everything today… you’re still so tight for me… I love you… I love you so much…”
He cums first this time, hips stuttering as he fills you again with hot, thick pulses, moaning your name like a prayer. But he doesn’t pull out. He stays buried deep, rolling his hips slowly to ride out the aftershocks while he kisses you messily.
After a few minutes of gentle grinding and soft kisses, you flip him onto his back. The green cloak spreads out beneath him like a blanket. You sink down onto his still-hard cock and ride him slow and deep, hands braced on the harness straps for leverage. Armin’s head falls back, mouth open in a constant stream of whimpers and broken moans.
“Look at me,” you whisper.
His eyes snap open, glassy and adoring, watching you bounce on his cock while the Eren harness digs into his skin. His hands grip your hips, guiding you gently even as his thighs start trembling from overstimulation.
“I’m gonna cum again— hah— please don’t stop— I want to feel you cum around me while I’m still wearing this stupid outfit—”
You ride him harder until you both fall apart together — you clenching around him, him pumping another load deep inside you with a quiet, overwhelmed sob.
The third round happens almost without words.
You’re both too tired for anything athletic, so you end up on your sides, facing each other. Armin lifts one of your legs over his hip and slides back in from behind in a lazy spooning position, the harness straps still digging into your back. His thrusts are shallow and slow, one arm wrapped around you, hand lazily playing with your tits while he kisses the back of your neck.
This one lasts the longest — just gentle, exhausted rocking, whispered “I love you”s and soft whimpers every time he bottoms out. When he cums for the third time he buries his face in your hair and cries out quietly, body shaking as he fills you one final time.
You stay connected for a long while afterward, breathing together in the dim hotel room.
Eventually Armin pulls out with a soft, reluctant sound. He disappears into the bathroom for a minute and comes back with a warm, damp towel. With gentle, careful hands he cleans you up, then himself, before collapsing back onto the bed and pulling you into his arms.
The green cloak is still half-draped over both of you like a blanket.
He tucks your head under his chin, legs tangled with yours, one hand stroking slow circles on your back.
“I can’t believe today was real,” he whispers, voice soft and sleepy. “The club room… the rooftop… this morning… the tent… and now this. I keep thinking I’m going to wake up and it was all just another late-night fantasy while I was jerking off to your cosplay sketch.”
You smile against his chest, tracing the lines of the harness straps still loosely buckled across his torso.
“It’s real, nerdmin,” you murmur. “And we still have the whole night… and tomorrow morning before checkout.”
Armin lets out the softest, happiest little whimper and tightens his arms around you.
“…Can we keep the harness on a little longer?” he asks shyly, cheeks burning even in the dark. “I like how it feels when you touch it while I’m inside you.”
You laugh quietly and kiss his collarbone, right above one of the straps.
“Deal. But only if you explain the entire rumbling arc to me while we cuddle… and then maybe round four when the sun comes up.”
He blushes so hard you can feel the heat on his skin, but he nods eagerly, already half-hard again just from the thought.
The city lights glow softly through the window as you both drift toward sleep — tangled together, still smelling like convention sweat and sex, his Eren cloak wrapped around you both like a promise.
Tomorrow the real world (classes, club duties, midterms) would come back.
But tonight, in this messy hotel room, nerdmin was all yours.
THE END.
(gimme a recommendation for my next project)












