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The backseat was too small for them. The car rocked faintly with every shift, leather seats squeaking under the weight of Martin’s body pressing Seonghyeon down. The windows had long since fogged over, the night air outside cool while inside it felt suffocatingly hot.
Seonghyeon’s back was pressed flat against the seat, shirt bunched halfway up his chest, skin damp with sweat. His thighs clung tight around Martin’s waist, ankles hooked behind his back so he couldn’t pull away even if he wanted to. Every thrust shoved him a little higher against the door, the seatbelt buckle digging into his hip, but he didn’t care.
Martin’s size was overwhelming. His broad shoulders nearly brushed both windows, his weight pinning Seonghyeon completely beneath him. Each roll of his hips drove in so deep that Seonghyeon gasped, head falling back against the leather. His fingers scrabbled at Martin’s shoulders, nails leaving faint red lines down the skin.
“Fuck...” Seonghyeon choked out, voice breaking on the word. His thighs trembled, trying to clamp tighter around Martin’s waist. “Deeper, please...”
Martin groaned low in his throat, bracing himself on one palm while the other hand gripped Seonghyeon’s hip hard enough to bruise. “Deeper?” he rasped, lips brushing the sweat-slick curve of Seonghyeon’s jaw. “You’re already taking me all the way, baby. You feel so fucking small under me.”
Seonghyeon shuddered, whimpering as Martin pressed back in, slower this time, making him feel every inch. His mouth fell open in a silent cry, thighs shaking. The stretch burned but it made his toes curl, the fullness leaving him dizzy.
The car creaked with every thrust, rhythm growing messy. Martin’s forehead pressed against Seonghyeon’s, sweat dripping between them, lips brushing as he panted. The sound of skin meeting skin filled the cramped space, slick and obscene, louder than either of them wanted but impossible to stop.
Seonghyeon clung tighter, legs cinching around Martin’s waist as if trying to fuse them together. His voice broke into desperate, high whines, muffled when Martin swallowed them in a rough kiss. Martin thrust harder, faster, the car rocking on its suspension, their bodies slamming together until Seonghyeon could only sob into his mouth.
“Look at you...” Martin grunted against his lips, pulling back just enough to see him. His big hand slipped down to grip Seonghyeon’s thigh, spreading him wider. “Shaking, clinging like you’ll die if I stop. You love this, don’t you? Love being stuffed full like this.”
“Yes, yes, fuck...” Seonghyeon cried out, voice cracking as Martin hit deep again. His nails dug into Martin’s back, leaving angry red crescents. His body arched helplessly, pleasure snapping down his spine. “Don’t stop, please...don’t...”
Martin’s pace grew brutal, hips pistoning, driving the air from Seonghyeon’s lungs with each thrust. The size difference felt unbearable now, Martin’s body covering him entirely, stretching him to the edge of breaking, forcing him open again and again.
Seonghyeon’s release hit fast, overwhelming. His whole body trembled, toes curling in his half-kicked-off sneakers, thighs locking painfully tight around Martin’s waist as he came hard between them, streaking his stomach and Martin’s chest. His cry echoed raw in the small car, voice high and wrecked.
Martin groaned at the feeling of him clenching tight around him, burying his face in Seonghyeon’s neck. His thrusts turned rougher, sloppier, chasing his own edge. A few more hard drives in and his control snapped. He spilled deep inside with a guttural moan, grinding down to the hilt as if to brand the moment into both their bodies.
The car went still, rocking faintly as their breathing filled the silence. Seonghyeon was limp beneath him, legs still locked around Martin’s waist, shaking with aftershocks. Sweat slicked their skin, the air thick with the scent of sex.
Martin didn’t pull out immediately. Instead, he kissed Seonghyeon’s temple softly, one big hand cradling his jaw. “Messy little thing,” he murmured, voice still rough. “Look at you, came so hard just from me fucking you open. Couldn’t let me go if you tried.”
Seonghyeon only hid his face against Martin’s shoulder, still gasping, thighs trembling around him. His voice was wrecked, hoarse, but he whispered, “Don’t… don’t pull out yet.”
Martin smirked faintly, pressing another kiss to his damp hair. “Wasn’t planning to.”
And with Seonghyeon’s legs still tight around his waist, the fogged-up car became their whole world, filthy, raw, and just for the two of them.