Not To Borrow But To Keep

Not to Borrow but to Keep

Shadow Monster x fem!reader— possessiveness, shadow tentacles, suspension, restraints, sex in a public but empty space, sensory deprivation, multiple orgasms, and creampie

It was always hard for Shadow Monster Captain to share you. Even though it was pretty inevitable given you were the only human in the Monster Apocalypse who could actually see them. They all wanted your attention, but no one needed it like he did.

Yet somehow he was the one standing guard at the abandoned library’s entrance, watching from afar as you give all of your affections to the dark gargantuan spirit who inhabits the library and is its sole reason for its withering state. No matter that it was he who offered, no insisted, he be on guard duty.

Seeing you give the other monsters the attention he so desperately craves has something dark swirling in his gut. It weakens his hold on his powers and the library grows darker as his shadows slip and begin to creep in.

The other spirits that rest on the floor and large plush chairs all waiting for their turn begin to chitter and chirp nervously. All of them speaking over the other before hesitantly turning to meet his thundering gaze.

Though you don’t appear to notice, getting up off your chair and heading toward a nearby bookshelf. Shadow Monster Captain glares back at the spirits and they immediately scatter like cowardly rats, shrieking their displeasure even as they run out of the room. Leaving him completely alone with you.

His shadows become darker by the minute, swallowing up the entire room to the point where you’re surrounded by him. Only him. It’s still not close enough. He walks over to you, his shadows coming off of him in waves. The moment you’re in reach his arms are curling around you and he’s tugging you into his chest.

A loud gasp echos against his shadows and your hands jump to the bookshelf to help steady you. Pleasure bursts in tiny shocks as you caress his shadows, an extension of himself.

“What’re you doing?” You ask breathlessly, not wanting to admit how fucking hot his silent dominance is. The things it does to you, you’re barely hanging on by a thread.

“Mine. You’re Mine,” he snarls, nuzzling into your neck.

You can feel each sharp tooth against your flesh and it only makes you that much more hotter for him. Your back arches into him on its own, pressing your ass into his growing erection. He snarls again, snapping his jaw at you in warning of encouragement you aren’t sure. Either way you don’t listen.

“Who says I’m yours?” You ask, practically moaning it you’re so turned on. Wanting so badly to finally push him over the edge.

And it does as his last flicker of restraint snaps and a fierce roar shakes the walls of the library you can no longer see clearly. He gives you no time to catch your breath as he pushes you against the bookshelf and reaches a hand between your thighs.

It takes you a moment to register the sound of tearing fabric as he rips your jeans and panties to shreds, exposing your dripping folds to the air, and not even bothering to fully undress you. It doesn’t matter, none of it does.

All he cares about is being able to sink into your tight cunt, and god, that’s the hottest thing anyones ever done to you. Reducing you to nothing but your sweet holes. And knowing how much he truly cherishes you only makes it that much hotter, his desperation for you has you gushing and making a mess of your thighs.

His thick clawed fingers push through your folds, spreading you open for him so pretty and you mewl, angling your hips and begging for him to take you. But he never touches where you need him most, claws barely just ghosting over your clit before falling back to tease your entrance.

“I say your mine, little human. And I think she does too, eh?” He rasps in your ear.

As if to prove his point he slowly pushes two of his digits in your sopping cunt. Your stomach burns in humiliation as a loud squelch pierces through the simmering tension. You can’t believe you’re so turned on, the need to curl into yourself and disappear into his shadows claws at you. But he’s making you feel so good with every torturous pump of his fingers you can’t imagine moving right now.

But just as your eyes start to flutter, ready to get lost in the sensation, he’s pulling back. The sudden emptiness has you whining without meaning to and you buck back, craving his long fingers back inside of you.

You go to say something, to beg and plead for more, when you then feel his big throbbing tip circle around your needy entrance. Every nerve in your body goes tight and you gasp, wanting so back to rock back and slam down on his cock.

His breath hits the shell of your ear and you swear you’re about to fall apart before he even gets inside of you. As if to ground yourself your nails dig into the shadows on the bookshelf and he hisses, hips jumping forward instinctively as he starts to push into you. But he quickly stops himself, panting as heavily as you are.

“Tell me. Tell me you’re mine,” he demands, tone as dark as his shadows.

You nod frantically but already you know it won’t be enough. He growls in response, putting just the tip in and your pussy immediately clenches around him, trying to suck him in. He just won’t budge, not until you say it. So you gather all the strength you have left and finally admit it.

“I-I’m yours— Fuck— I’m yours!”

Your fierce shout fades into a vulgar scream as Shadow Monster Captain slams the rest of his massive cock inside you in one long stroke. His fierce growls vibrate against your back as he doesn’t hesitate you plunge into your tight hot pussy like a feral beast.

All you can do is hold onto the bookshelf with all you have as he fucks you within an inch of your life. The power of his thrusts force you up against the shelf with each snap of his hips. All the air is forced from your lungs, leaving only the feeling of his length filling you over and over again.

Moans spill from your lips in an endless stream as so much pleasure courses through you, you can’t even contain it. And your encouragement only seems to spur him on further, his claws sinking into your wide waist and jackhammering his cock into your perfect pussy.

He fucks you so hard your feet don’t even touch the ground anymore, his hands and his shadows suspending you in the air and allowing him to bury himself inside of you as hard as he desires.

“All mine. Finally. All mine,” he growls, his voice slipping as he forgets your language completely. Though he doesn’t stop rambling praises you don’t understand in his native demonic tongue.

His shadows tighten around your body and quiver against you, sending bolts of arousal straight to your core. Your cries grow louder with each drag of his length along your warm walls and you know you won’t be able to last much longer.

“Yes, oh my— nngh!— yes I’m yours, I swear it!” You shriek in response, vision flashing white at the intensity of your impending orgasm.

Just then you feel the tiniest tendril of a shadow rub against your clit just right and it sends you hurtling over the edge. A loud ringing fills your ears and you’re only barely aware it’s your own screams as you shake through the most mindblowing orgasm of your life.

If Shadow Monster Captain wasn’t holding you up your body would’ve given out by now. All you can do is shake, unable to move away from the overwhelming pleasure as he works you through it. Even as you clamp down around him he keeps going, unknowingly rambling about how perfect you feel around him and how gorgeous you look when you cum on his dick.

He can sense your next orgasm building so he clenches his teeth and keeps on going, already addicted to the feeling of you squeezing him. It’s only when you’re thrown into your second orgasm does he finally join you. Burying himself inside of you to the hilt, once, twice, and three more times before letting himself cum. A deep rumble builds in his chest as he pumps you full to the brim with his hot seed.

His shadows remain around your limbs possessively, unwilling to let you go. Shadow Monster Captain sags against your back, nuzzling into your neck again, and remaining as deep inside of you as he can be.

Slowly but surely his shadows recede and the light from the library windows trickle back in. But still he doesn’t let you go and you know he’s still thinking about his claim on you. You are too but his next words are what finally take you out.

“And I’m yours.”