Work Text:
Midoriya was marching his way through the dark tunnel, not having a care in the world, laughing maniacally along the way looking forward to tomorrow and what adventure it might bring. But that's when he heard something behind him, some sludgy sound that stopped him in his tracks and made him turn around to find the source, only to let out a gasp seeing this large mass of liquid forming before him. Staring up to it he was paralyzed by fear, his fear only grew when a voice came from the thing in front of him, "A medium-sized invisibility cloak," that's when it lunged at him and surround his body and lifted him of the ground. He dropped his precious notebook full of knowledge on heroes and how to be one himself, the villain took this moment of shock as an opportunity and stuck a tendril inside the boys mouth.
"Don't worry. I'm just going to take over your body. Calm down. It'll only hurt for about 45 seconds. You'll feel better soon." Though his mouth is covered he a very muffed, "I can't...breath," can be heard as the boy tries his best to grab the monster and pull him away from his mouth to get some air. This amuses the villain greatly so and he says, "You can't grab me. I'm fluid! Thanks for the help. You're my hero. I didn't think that had come to the city." The monster continues his assault on the boy, forcing his way down his throat, then he starts to constrict around the his body trying to hurry along as to escape that beast of a hero. All the while Midoriya is left only to his thoughts, 'My body...There's no strength,' his hands finally falling off the monster giving up fight, 'I'm dying...Am I dying?'
'This is taking too long,' thought the monster, 'there has to be a faster way to get inside him.' The boy trying to stop him from going any further down his throat was getting annoying so he started to feel around his body, he then decided to tear of his clothes to get a better feel of him, tearing a hole around his ass and his cock. The creature warmth and continuous pulsing movement having an adverse effect on the boys body, feeling the sludge finally come into contact with his lower half, causing his body to betray him and become slightly aroused. The protrusion and light throb did not go unnoticed by the monster, chuckling, "You like this type of thing huh? You're one of those people," he surrounded the the arousal and proceeded to massage it as another form of torture.
Now fully at attention, the monster got a clever idea, he spread the boy's legs and his cheeks as to get to his hole, 'Another hole to fill will help me get in faster,' he thought as he slipped inside his body. Being made of slime and not anything too solid it was an easy enter, massaging him from inside to widen him to fit even more inside, though he was starting to get other thoughts in mind. Midoriya was trying his best to resist, but with the monster starting to enter him and his hardness surrounded by the sludge that kept stroking him made it impossible to not give in and give out a muffled moan.
By this point his hole was big enough to fit a finger inside, so the sludge monster formed a small tendril, slipped it inside, then started thrusting in and out of the boy, he hit a spot inside that made the erection he was surrounding twitch. As that was happening the sludge in his mouth started to change, it became more solid and more phallic shape, then it started pulling out of his mouth, he tried his best to get a breath of fresh air but was cut short when it forced it's way in. It started a slow gentle thrusting in in his mouth, he tried his best to get air as to not pass out, though he wouldn't want to be awake for what happen next.
A second tendril went inside him and started thrusting along with the other one, soon they stopped and began stretching his hole wider, he thought that was the worst but then he felt a thicker tendril three times the size poke at his gaping hole. It slowly went in, the two other tendrils morphing into the larger one making it even bigger, it started thrusting in and out, slowly sinking deeper and deeper continuously hitting that special place in Midoriya making him moan involuntarily. His eyes started to tear up from being violated and having his virginity stolen by this creature, his body kept betraying making him moan into the tendril filling his mouth that started to travel deeper down his throat. The sludge around his cock kept getting tight and loosening up and also stoking him bring him unwanted pleasure making him wish now more than ever he had a quirk to get him out of this situation.
The thrusting in his rear got rougher, making an effort to hit his prostate bringing him closer to the edge, he could hear the sludge making groaning sounds feeling the vibration all over him. The tendril in his mouth pulled out, "I feel that you're close. Cum for me," he whispered into his ear and started stroking him faster which made him start to twitch erratically and squirm in the sludge ready to blow his load. The tendril in him shoved in further than it ever had been, this brought him over the edge, making one last moan, he squirt his first shot directly into the sludge and in between his first and his second shot, the monster did something. In a last minute act of debauchery a bit of slime went in his tip, going down and anticipating the next shot, made a sucking motion bring the shot out faster than the last, making his entire body convulse in pleasure. Shot after shot was sucked out of his body, making him moan and convulse over and over again, when he finally stopped and started to relax panting, the tendril that was in his mouth came back and forced it's way back in continuing it's thrusting.
The tendril in his ass was getting faster and rougher, losing any rhythm it had, the sludge around him vibrating even more with groans and it also began stroking his aching cock from the inside and outside, back to a painful erection. The rough thrusting in his mouth and his ass started to feel good, this threw him into a painful confusion, the sucking on his cock got more intense and only cumming seconds ago made him close to the edge already. "Are you ready for my load? I'm gonna fill you 'til it hurts," like it already didn't, the response was a pain and muffled whimper that brought the villain even closer to his edge making thrust even faster groaning in pleasure.
Midoriya felt the monster shove deep in him, almost to his stomach from both ends causing a bulge to form in his throat and his lower abdomen, the thick bottom one going all the way through his intestines. The one in his cock went even deeper, on the outside it began to suck on his balls, trying to massage more of his cum out of him and then the monster began to spasm all around him, that's when all three tendrils in him gave one big throb. With a loud groan the monster came in all of his holes at once, the one in his throat shot straight into his stomach and the one his ass had no more room except to shoot into his stomach from the other side, both very filling shots. The one in his cock shot up inside him going both in his bladder and his balls, the pressure it took to get to his balls opened up the passage more allowing the sludge to go deeper, it started to coddle his testicles from the inside. This pushed the boy over the edge again, but he had to contend with the cum flowing in his balls while his body tried to contract it out at the same time, the monster's cum filling his balls more and more causing him more pain.
He could feel with every throb of the tendrils a ball of cum pushing his hole a little more then traveling up his ass into his intestines, shot after shot just kept traveling through his body while he could do nothing. His belly also being filled from the same sensation coming from the other way, he could see the bulge of cum going his way, then he could feel it going past his lips, then he felt the tendril pull back which was a blessing until it started firing in his mouth. The monster thought he should get a taste, Midoriya could feel how it's tip flared in his mouth ensuring that he had to swallow, needing air and afraid the monster would block up his nose stopping from getting it he swallowed every shot. The taste was salty but the worst part was how he kind of liked it, he started to want to swallow and greedily started to suck it down in shame, this pleased the villain greatly so that he started thrusting in his ass again to feel him moan into to his cock head. Hitting his spot over and over again made his body try to cum harder, but the invasive sludge just made it backfire inside him, his bladder starting to feel full itself, a little cum seeping up the tubes to his kidneys.
The thrusting in his ass making some of the cum seep past the seal of of his cock like tendril and the intestinal walls of the young boy, a few seconds and some finally reached his entrance and leaked out into the sludge surrounding his body. The villain was having the time of his life violating the boy, feeling him squirm trying to resist, his insides in all three holes he was currently occupying, his sludge form allowing him to have such long cocks thrusting in and out of such a tight, once virgin, body. The boy's stomach was so full with cum now, causing an obvious bulge to form on his belly making him look pregnant, the shear depravity of the situation pleased the monster and resentfully pleased the boy who enjoyed being filled in such a way. He couldn't help but try and clench his gaping hole while the monster was still filling him as an attempt to push him out, he only succeeded in pleasuring the monster more driving him on to thrust harder in the boy continuing the cycle of pleasure.
He kept filling the boy but he could feel the end nearing so he thought he'd do one last thing to finish this up, to make sure this boy would never forget this experience and never feel this pleasure again. He finally pushed all the way inside his ass and popping into his stomach, he pushed into his mouth down his throat and entered his stomach from the other side, meeting the middle and filly his stomach with sludge and more cum. The one in his cock going in deeper, filly both his balls and his bladder with sludge and cum, his ball got bigger while his bladder didn't have much room which forced some of his cum to go into the boys kidneys. With a few more shots he was done, he separated the the tendrils in his ass and cock from his main body and let them slide right in, his ass was left open and when the last bit of sludge finally reached his stomach it let his cum begin it's journey down his intestines. Even though he was open and not closing anytime soon, it took his cum over 10 seconds before it started to spill out, the villain left that part of his body out in the air to cool of and let his cum trickle down the boys legs. He also left the boy's cock out in the air too, his tip was wider than it should ever be and both their mixed cum started to drool out of it, from so much stuffed in and being denied an orgasm, it took a while for his body to start shooting out torrents. This made the boy moan painfully around the tendril still in mouth that was still forcing sludge inside of him in order to let the villain possess him.
They staid still like that for a bit. torn pants showing his ass and cock to the world letting the breeze in the tunnel cool him off while globs after globs of cum leaked from his ass and he kept involuntarily cumming. Then with a satisfied breath the villain said, "Now that I've had my fun. Let's get down to business." The sludge went deeper inside of him, reaching up his nose to get to his brain and filling his lungs stopping him from breathing, 'I'm dying...Somebody...Somebody...! No...!' In that moment a sewer grate could be heard hitting the ceiling, causing the monster to stop and turn around in fear knowing full well what is was. "It's all right now, young man," a heavy foot stomp could be heard and the muscular silhouette of All Might could be seen at an end off the tunnel, "I am here!"