I Called It Out First and Got My Ass Fucked
"What... what the hell are you?"
The Black Book gave no answer.
Sea stayed crouched for a long while, staring at nothing but the cover. She had the feeling that the moment she touched it, it would start writhing again, yet from the closed book she couldn't sense so much as a twitch. In the end, it was Sea who looked away first.
"...What am I even asking a book?"
In the bathroom she washed away the slime and fluids that had dried on her body overnight, stripped the bedsheets, and stuffed them into the washing machine. When she came back into the room, the suitcase's zipper was still gaping open.
"..."
She told herself she ought to wrap it in a towel again and zip it all the way shut. She didn't.
When late afternoon came, Sea locked the door first.
Click.
With every curtain drawn, she sat at the desk and fidgeted with her fingers for a long time before finally taking the Black Book out of the suitcase.
"I'm only seeing how it reacts."
She set the book in the center of the desk. Ready to slam it shut at the first sign of anything strange, she hooked one hand on the corner of the cover and lifted the black binding. The pages opened about halfway.
Yellowed paper came into view. When Sea leaned a little closer, the folded crease in the middle bulged upward.
A single slender tentacle rose slowly from between the pages.
"...Oh. Hi."
Its rounded tip groped at empty air, then settled onto the desk. The root ran in a long line from the book's crease. Rubbing along the smooth surface, it crept toward the hand Sea had left there.
She snatched her hand back on reflex.
"Can you understand me?"
No answer.
After a moment's hesitation, Sea turned her palm up and offered it again. A cold, damp tip touched her little finger and slowly traced between her fingers and over the lines of her palm. Every time she flinched it stopped, and if she didn't pull away, it moved again.
"You... you know how to behave, huh."
The tentacle wound once around her wrist, though it didn't squeeze hard. Sea tested the caught hand, then pressed the tentacle's side firmly with another finger.
The soft body dented under her fingertip and sprang back. In that span two more stalks rose—one touching her right knee, the other curling around a chair leg to stroke her calf.
"S-scary! Don't just suddenly—"
Sea tried to pull her hand free of the tentacle around her wrist. The soft body stretched a little, but it didn't let go. The tip that had been fondling her knee slid along the hem of her shorts and inward over her inner thigh.
"Not there."
It was the instant she reached out with her right hand for the black cover.
The tentacle around her wrist shoved that hand aside. At the same time a thick stalk that had drooped beneath the desk coiled around her waist.
"Wait—! I was just checking—"
The tentacle around her waist lifted her. The chair was shoved back behind her knees, its wheels rolling a short way, and Sea lost her balance and planted both hands on the desk.
Her stomach and chest pressed against the edge. The Black Book was about two handspans from her face, but the tentacles around both wrists pinned her hands to either side of the cover.
"No. I didn't open you today to do that...!"
Instead of an answer, the stalk around her waist dragged her hips backward. Two other tentacles wrapped her thighs and spread her legs to shoulder width.
Shorts and panties came down together to mid-thigh.
Sea tried to pull one hand back to cover her ass. The tentacle at her wrist didn't clamp down hard, but it held just firmly enough that her palm couldn't leave the desk.
"Don't look..."
She couldn't have said who she was talking to.
A slender tentacle climbed her inner thigh. The slime-slick tip didn't graze beneath her pussy; it moved farther back. When the rounded end touched between her cheeks, Sea's back went rigid.
"Not there."
The tip traced around her anus.
"Wait, wait! That place is really off-limits...!"
Cold slime was smeared wide around the entrance. The once-round tip slowly flattened, spreading like a soft ribbon, and the thinned surface covered her anus and rubbed from side to side.
"Hnn... that's weird..."
Sea clenched her ass and pulled her hips forward. The tentacle at her waist hauled her back into place, but the broad tip didn't force its way in. It only worked on more slime, pressing and releasing the clenched opening.
Another thin tentacle slipped between her cheeks. This time a tip thinner than her pinky pressed the very center of her anus.
"Hiek...! Don't!"
The tip parted the entrance a little, then slipped out. When Sea clenched her sphincter, it circled the outside again and slowly rubbed the same spot.
She gripped the edge of the desk. The Black Book lay open before her eyes. If she reached her left hand just a little farther, she could push the cover shut.
Her fingers wouldn't move.
"Just a second...! That's—that's a different place...!"
Her voice dropped. The thin tentacle pressed her anus again, and this time the slime-coated tip slid just a fraction inside the entrance.
"Nnh...!"
Sea held her breath and clenched. The tentacle stopped there too. When it didn't push deeper right away, she let out a long, trembling breath.
The instant her strength gave out, the tip sank in another segment.
"Ah, wait...! Slowly, please..."
It drew back a short way, then pushed in to the same depth, over and over. As slime was worked deeper, the sharp friction eased little by little.
When the thin stalk that had been spreading her anus withdrew, the thick tentacle waiting behind rose between her cheeks. The tip that had been spread flat curled inward. The broad surface folded, tapering into a smooth, long cone.
"Ah... nngh! Nnh, ah... ahh...!"
The narrowed tip touched her wet anal entrance.
"No. What do I do... hnnk! Ah, it won't go in...!"
Contrary to what she expected, the tip—not sharp at all—parted the entrance and slowly burrowed in. Once the narrowest part was inside, the tentacle stopped. Sea braced her elbows on the desk and, without meaning to, lifted and dropped her heels several times.
The tight hole bit down as if trying to shove out the unfamiliar girth. Unlike when it had been driven into her pussy, her anus clenched hard, trying to expel the intruding tip, and the weight of it felt as if it plugged her all the way into her belly.
"It hurts... take it out..."
The tentacle neither withdrew nor pushed deeper. It held the same depth.
A long while later, Sea let out the breath she'd been holding.
"Haa..."
Soon it worked in up to a slightly thicker section.
"Hnn...! W-wait..."
Her clenched anus slowly stretched around the shaft. Only the part already inside swelled gently thicker; the length still outside her body stayed thin. It didn't slam in all at once. Whenever her anus bit down again it stopped, and each time her strength slackened it fed in only the next segment, little by little.
Sea's toes fidgeted and scraped the floor. In front of her face, the yellowed pages trembled faintly in time with the tentacle's movement.
"Auuu... i-is the whole thing coming in...?"
More than half of the thick section was inside. The heavy fullness plugging her rose all the way under her belly. The hole that had only hurt at first stretched under the slime and the repeated insertion, and the shaft buried inside pressed every corner of her inner flesh without a gap.
The tentacle didn't thrust in long strokes.
The length inside her anus writhed. The center of the once-smooth surface swelled round, then slowly sank, and the section farther out swelled next.
"Wh-what are you doing...?"
Round nodes that began at the deepest point formed one after another toward the entrance. One pushed up against her inner walls and subsided, and the next swelled right after it. Every time a node bulged in place, her anus clamped the shaft of its own accord.
"Nnh...! That's weird, that—take it out...!"
The harder she clenched, the clearer the shape of those round nodes shoving her flesh became. The tentacle barely moved in and out, and yet inside it felt as if something thick kept stroking back and forth.
Another slender tentacle came around between her thighs. Its slime-slick tip swept the parted cleft of her pussy from bottom to top.
"Ah...! Don't touch my pussy! I-if you do both, I'll die...!"
It didn't enter her. It smeared slime between the split flesh and briefly grazed beside her clit. When the nodes inside her anus pressed the deepest place, it paused; when that pressure traveled down toward the entrance, it gave the sensitive bud a light press.
The two sensations fell out of rhythm. While Sea couldn't decide which one she was supposed to stop, the round nodes moved again.
"Hnn, ah...! I didn't tell you to do that..."
The tentacles holding her wrists were still loose. Sea inched her left hand toward the Black Book until her fingertips touched the corner of the cover.
If she pushed it shut now, she could end all of it.
One node inside her anus swelled hard and pressed deep. At the same time, the tip that had been circling beside her clit dragged a long stroke over the sensitive bud.
"Hyaaht...!"
Sea's hand stopped.
I have to close it.
This wasn't what she'd wanted. And yet, in the end, no strength entered the fingers on the cover.
"Take it out...! I—this is really... hnnnngh!"
The nodes inside her anus sped up. The deepest place swelled, and before it could sink, the section below it swelled in turn. As the bulging nodes swept down through her insides, her anus twitched and clenched along the shaft.
The tip on her clit gave a short press each time the inner pressure eased, stringing the sensation along without a break.
Sea bent farther over the desk. Her T-shirt rode up, and her stomach pressed against the cold edge. Her thighs trembled. Her heels lifted off the floor on their own.
"Ah, no... I think it's—it's coming again..."
The round nodes contracted in rapid succession from the deepest point.
The tentacle over her clit vibrated in short bursts.
"Aaaht...!"
Sea's lower belly clenched hard. Her anus bit and released the buried shaft again and again, and every time she clenched, the swollen nodes raked her inner flesh harder. Spasms spreading through her thighs and belly kept her legs from straightening.
"Ah, nngh...! Stop... stooop..."
Her fingertips were on the cover, but she couldn't close the book. Her whole body shook. The keen pleasure gathered on her clit and the thick nodes plugging her ass stirred her all at once, and her mind went white.
Before the climax had even faded, the deepest node swelled again.
This time it was hard. The thickened section pressed the inside of her anus and began to pulse.
"No... don't come in there..."
Hot, thin white fluid poured deep into her ass.
"Hnnk...!"
Even after the first spurt struck deep inside, the tentacle spasmed several more times. Hot fluid flooded the space between the shaft and her anal walls. As the swollen nodes gradually thinned, some of it was pushed out past the entrance and ran beneath her ass and along her inner thighs.
Sea lay facedown on the desk, gasping.
"Haa... ha..."
The tip pressing her clit stopped vibrating. The round nodes inside her anus sank one by one, returning to the original smooth shaft.
The tentacle didn't rush. It withdrew slowly, and each time her stretched anus twitched and clenched along the sliding length, Sea's waist trembled faintly. When the last thin tip slipped free, the fluid left inside poured out all at once.
"Uuu..."
The tentacles that had held her wrists and waist loosened too. Sea couldn't move for a while. Then she barely managed to push herself up, wiped her ass and thighs with tissues, and slowly pulled up the panties and shorts caught at mid-thigh.
The book was still open.
The tentacles trailing from the pages lay limp across the desk and the floor, writhing slowly. When Sea took the black cover in both hands, none of them seized her wrists again.
The cover closed.
Every tentacle joined to the book was dragged toward the pages at once. From the stalks dangling under the desk to the tips still beside her thighs, they slid away in order and vanished.
Sea kept her hands on the closed book and couldn't lift her head.
"Why did I go and open that..."
She fetched a towel, meaning to wrap the Black Book. Halfway through covering it, she lifted book and towel together and bent toward the suitcase—then stopped.
A moment later, she unwound the towel again.
She set the Black Book on one side of the desk, in a place she could reach the moment she stretched out her hand. The suitcase remained under the desk, mouth agape.
Sea checked once more that the door was locked and sat down. She opened a workbook, but the letters wouldn't go in.
Her gaze kept drifting to the black cover beside her.