Thread by @nxxdio

#出勝 #dkbk
🔞(nsfw) Dragon Deku/Size difference

All I think about lately is Dragon Deku fucking Katsuki in his half-dragon form. Katsuki tries to get him to fuck him in his true form, but this is all Katsuki gets because he isn't ready for his true form.

Kacchan disagrees.

But Deku lays there as he watches Katsuki pushes himself down. He's putting on a brave face, full of pride as he tries to prove to Deku that he can take his half form.

But Deku can feel him shaking, his breath catching with every inch in him.

Katsuki finally bottoms out. But he's gasping, trying to breathe right because he feels too full like he's about to burst. He thinks, briefly, that maybe he's in over his head. Then a clawed hand combed through his hair and he melts into the touch.

"If you're not going to move, I'll help you."

Katsuki jerked up, alarm firing through his veins. "W-wait-! Mngh!"

Deku moves slowly, but it still makes Katsuki's breath stutter. It was torturous. The slow slide of his cock against his walls, pushing against his insides.

Deku looks unbothered. Satisfied with taking his time as he cracks Katsuki open, piece by piece. Katsuki tries to say something, but Deku times it just so, so all he can do is whine, blunt nails scraping against his scales.

Deku kisses his forehead. "How does it feel, Kacchan?"

Like the bastard doesn't know what he's doing. Katsuki moans as he presses Katsuki down flushed against his balls. He doesn't look down, doesn't know if he wants to know what his stomach looks like.

Katsuki mumbles. He isn't quite sure what he's saying.

"Hm? What is that? You want it faster?"

Katsuki's traitorous dick twitches in interest. Katsuki's heart pounds in fear but also in anticipation. Deku kisses him and before Katsuki could stop him, Deku lifts him like a doll and slams him back down.

Katsuki couldn't scream as he came. Deku doesn't stop as Katsuki writhes, gasping and gurgling. It was too much and not enough. He didn't know weird the pain and pleasure began. He was... he was going to break. His mind is going funny over a fucking dragon dick in his ass.

"You won't," Deku assures him. "You can take it, you told me so." God, the confidence Deku has in him makes him want to try.

Against his previous thoughts, he looks down. The way he can see the outline of Deku's dick makes him feel some kind of way.

Later, Katsuki would admit it was kind of hot.

"D-Dekuu. F-fuuuck!" He gasped as he came again. Deku doesn't stop, because the bastard likes to push and Katsuki doesn't stop him because-

"You can do it," Deku kissed him. "I know you have it in you." Katsuki whines.

He doesn't feel like he could, but for Deku, he wants to try.

He's on his back now, almost fold in half. Katsuki squeals as he feels Deku pressing in deeper at this angle. His thrashing legs are useless against Deku's half form. His hands scramble against the sheets aimlessly.

His skin felt too tight, his head floaty. It was too much. It was so good. Too good. He thinks, fleeting, that Deku's true form would ruin him. Not a bad outcome.

Deku drags him back from where he floated to, tearing screams out of him as he pushes him closer to the edge.

"Kacchan," Deku breathed, expression twisted as he tries to hold himself back. "I'm going to come." He starts to pull out but Katsuki grabs onto his hair and horn.

"N-no!" Katsuki pleads, trying to keep him in.

His tongue is useless in his mouth, making his words slur together as drool dribbled out the corner of his mouth. "Stay. In me."

Deku bares his teeth, clamping onto his shoulder, breaking the skin. Heat floods his inside in waves. Katsuki thinks he screamed as he came.

He isn't sure. All he knows is the pleasure lingering in his body, making it twitch, his limbs flop uselessly. Deku pulls out. Katsuki feels too hollow. He sobs as his rim attempt to close around something that isn't there.

Fingers slide in instead, pushing in and out.

The sound of the cum squelching in his ass sounded filthy. Fingers pump in and out easily. Deku kisses his head, brushing his sweaty hair aside. "Kacchan. My sweet pet. You're the best."

Katsuki mewls, barely tethered to consciousness as Deku works him up into another orgasm.

He weakly moans as his cock spurts pathetically.

"You did it, Kacchan." Deku praises him. "My sweet Kacchan."

Deku curls over him, wrapping him up in his arms as he plugs him with his cock. Katsuki is barely holding on, but he finds the strength to kiss the bastard.

"Took your stupid, fat cock." Katsuki slurs.

Deku's chest rumbled as he chuckles. His form shrinks until he's human-sized once again. Deku nuzzled against his neck, teeth grazing against his skin.

"Gonna beat you next time, too." Katsuki mumbled eyes drifting shut.

"Get you to use your true form."

"U-uh, well..." Deku coughs. Gone was the dominating dragon and in his place is shy and fluttered Deku. He coughs again. "You do know that I have two, right?"

Katsuki makes a grunt of confusion.

Another cough. "Two... er... um... pe-pen-"

Like lightning striking him, Katsuki's eyes fly open.

"YOU HAVE TWO DICKS??!!"

end