Dec 23rd: My Hero Academia - Sex Marathon 2

A sequel to this chapter: https://chyoa.com/chapter/Dec-19th%3A-My-Hero-Academia---Sex-Marathon.1259086 Last year when I wrote it, I complained we wouldn't get another chapter of the manga it was based on. Then chapter 4 came out in 2023. Let's hope fate works again to give us chapter 5 in 2024!

Deku had perhaps never felt as pent up as he had right now.

His balls not only ached, they not only felt bigger, but it was actually affecting his mentality. Super strength was something you didn’t want to lose focus on maintaining, the latest in a long line of pencils crumbled in his hands as a lapse of concentration made him crush the wood easily between his fingers. Not to mention the hole in his desk from where he’d tried to put his cup of calming tea down.

Why was he like this? Well, get this, he hadn’t had sex for two whole days.

The fact that was all it took filled Deku with immense shame.

But to be fair, it wasn’t fully his fault. The normal hero/school life he’d been promised had all been ruined that day the villain entered his two friends.

What followed was a growing addiction, from both of them, where the villain became enamoured with Deku’s cock and lavished him in both praise and pussy… which Deku had become addicted to in turn.

Months of new girls all mind controlled into loving him, and threats of their **** if he ever defied the villain. Months of nutting three times a day, then five times a day, then ten, twenty, until he eventually lost count in a day. A goo type villain that could not only infiltrate minds but increase certain chemical production to increase sperm count, increase cock size, and increase how addicting just the smell of a woman was to Deku. Thankfully he was the only man seemingly able to be controlled, as the slime had limits to their quirk, but it was still rather painful to hide his boner for so much of the day.

So that’s why, when the villain had said he wanted a week off of having sex, Midoriya had both wanted to accept without hesitation and also wanted to beg for it not to be true.

It wasn’t fully clear why this was happening but the only rule was that neither were allowed to masturbate, for some reason.

That was two days ago and Deku was at the end of his fucking rope.

He’d still had to go to class, still had to sit near the amazingly smelling Momo. Still had to see the tongue of the blowjob queen Tsuyu. Still had to dream about the full pink body of Ashido, or Jiro’s cutely shaped butt, or even just knowing that Ochaco could be gagging on his cock right now. So the whole day his imagination had tortured him. Edged him.

But Deku was a hero. He could hold out for the whole…

Ah fuck it.

“Deku! You’re going to spoil the surprise!”

The green haired eighteen year old had tried to find a bit of an older target, after his run in with Mirko he’d had some secret hopes of other pro heroes joining his strange harem. As such he’d been spending more time with his teacher Midnight. It may have been amoral, but her matured cunt stretching around his cock and milking his cum before she had to teach the class was particularly hot to him.

So that was why he’d walked in on her in her room on campus to a shocking revelation.

She was entertaining a guest.

“Ahh, the young man can’t hold back anymore, can he?!” The booming voice of the blonde in front of him smiled widely, standing up from the bed they were sat on to walk over and slap Deku in the shoulder, “Perhaps a whole week was a bit of an unreasonable ask for you, eh?”

“Bah… snah… hah…”

A huge belly laugh unleashed in front of him, almost strong enough to push him off his shaky feet, “Surprised? Well, I would be too if a true American hero stood before me!”

“Stars and Stripes?!” He gawped. The muscular beauty from another country flexed her humongous muscles, the tight flexible red, white, and blue costume sticking tightly to her impressive form. “H-how?!”

“Mirko has her ways, even super strong women like Cathleen here need to sleep sometimes,” Midnight mewled from the bed, though her smirk turned quickly to frown as she sighed, “I wanted to get some more testing in before we did anything though…”

Stars and Stripes just laughed once more, “This form feels too powerful to take it easy! Let us take the initiative like Deku here and begin the process already!”

“Pr-process?” He gulped, the feeling in his gut not liking where this was going, “W-what do you mean?”

“We were-”

“Easier just to show you!” The blonde giant laughed, placing a hand to her temple to concentrate before emanating powerful words, "The 'slime' quirk is a hundred times more powerful than it was before, with new abilities to control men as well!”

“WHA-?!”

A month later

The bustling energy of aspiring heroes filled the air with anticipation this day, like every day. Students clad in vibrant hero costumes navigated the hallways, their laughter echoing as they exchanged stories of the latest training exercises or shared insights about their quirks. In the common areas, clusters of friends gathered, discussing heroic aspirations and trading tips on refining their abilities. The cafeteria buzzed with animated conversations, punctuated by the clatter of trays and the occasional burst of laughter. The courtyard, bathed in the warm glow of the sun, provided a picturesque backdrop for students honing their quirks or engaging in friendly sparring matches. Teachers strolled through the campus, offering guidance and encouragement, while the atmosphere exuded an air of camaraderie and determination.

Inside one of U.A.'s many classrooms, the air was charged with a blend of excitement and studious concentration. Midnight, the current instructor, stood at the front with her characteristic poise, her captivating presence capturing the attention of the students.

“Now then class,” Her sultry voice danced through their ears, eager to learn and develop their skills, “I will now show you the proper manner to give Deku a blowjob.”

“YAAYYYY!!!!”

It had been a long few weeks for Izuku.

As soon as Stars and Stripes had uttered those words he knew he had limited time. Not to stop the quirk, no. That… was inevitable. Life would never be the same again after that and Deku knew from his history of following the legendary American heroine. He knew he only had a limited time to live out a heroic life.

Vigilantism came naturally to the boy. Running from a U.A. that would be fully infected by the morning, he ran to the streets to take on any and all crime he could.

It started well. Using his powers to take down a plethora of bad guys, some even way above his weight class, but after a few days things became too… easy.

Shigaraki gave himself in.

Overhaul renounced his evil ways.

All For One was found dead in an underground base.

One by one these villains, untouchable paragons of power, were falling. The world was becoming more peaceful, thanks to this newly powered slime quirk. And it was closing in around Deku.

Some thankful civilians managed to trick Deku into coming into their homes and trying to get him to fuck them senseless. Some female villains were getting the drop on Deku, only to suck his cock while he was captured. All Pro-Heroes, all his classmates, people on the street…. Deku couldn’t trust that any weren’t subliminally controlled by this quirk now.

And after so long, letting his libido fester and gestate, wishing he could return to that life of sexual bliss with his classmates, Deku found that peace was too tempting an offer to ignore.

“Had enough playing the hero?” Mirko asked him. He had returned unknowingly to the bed where he’d fucked the rabbit all night long. With her already waiting for his return, like nothing he’d done had really mattered. “You fought well, Deku. I’m very proud of you. I know this isn’t the path you thought it would take, but do you think you could return to me now? I have so many women for you to fuck, all these other men I’m controlling just don’t have the same ‘It’ factor as your cock.”

The final door to escape closed that night. Deku shut it himself.

Which brings us up to date with the blowjob lesson!

“His cock has grown so big, so be wary of your throat and don’t **** anything. Deku hates when he hurts others, please be aware of the limits of your throat as it gags around his meaty fuck pole.”

Midnight continued to demonstrate for the class. Her older throat wrapping tightly around thick girth as it had many times before. Grabbing his balls and gently squeezing them gently was just an added lesson for those astute enough to concentrate. Spittle flew everywhere. Heat from lust filled the room. Momo was biting her pen, Ashido was slowly melting her desk, and the guys of the room all seemed to nod at the sight fairly peacefully.

With no one to teach, the classroom was filled with simple gags from the teacher. A silent Deku using her head to stroke his cock back and forth, without any remorse or concern, just fucking her mouth before filling it powerfully with cum.

Why keep the illusion of U.A. up? Well, mostly to have fun with Deku, but it had also been partly his request to let everyone live their lives whenever he wasn’t around. After Bakugou had prostrated himself on the ground and apologised for 'everything', Deku knew he'd never be able to return to what was. It was a nice gesture but hollow in this new world. The green haired man wanted to be with the slime, but also let those it controlled to mostly forget about Deku whenever he wasn’t in the room.

It worked out surprisingly well for the slime user.

Having your hive mind be stretched even thinner had been straining, so the plan was to still let most minds act like they would have but instead add new sexual triggers for whenever Deku was around. Like a walking fuck virus. The stud didn’t even wear clothes anymore. Just a hugely thick cock to wonder the halls of his school or various Pro-Hero agencies and fuck whomever he liked.

And through it all, Deku had to admit he liked this new life a lot. For all his complaining, this was a pretty great deal. Peace and pussy. He was saving everyone while getting his dick wet in the finest asses across the world. A thought had entered that maybe he was being controlled too, but that didn’t even matter after a while. Why think about it when you could just keep ploughing on?

It was also definitely making a positive effect on the world.

Right there in the classroom was Himiko Toga. Now an upstanding student with many friends, she was perhaps one of the biggest turnarounds thanks to Deku thinking she was kinda hot. They’d fucked so many times now, with her changing forms midway through sometimes just to appease him.

Female villains also filled in some staff roles too. Slice and Curious had been added to the roster, as well as a woman rescued from prison called ‘Lady Nagant’. Like with Midnight, Deku truly enjoyed walking into a classroom and feeling the lesson plan shift to revolve around his pleasure. Fucking your teacher in front of everyone was a dream few got to achieve, but Deku took advantage of it many times.

His morals had probably broken somewhere along the way. Perhaps when he was fucking Mitsuki with her husband watching on with a happy grin. Or when he took the Pussycats on live TV for the nation to watch. Or when Stars n’ Stripes had made her pussy phantom connected to all the girls in U.A…

Endless pussy had broken Deku’s resistance and the slime user couldn’t be more happy.

A hive mind and their lover was a powerful ****. Every night they snuggled together, no fear of being found out, with whatever body Deku had been thrusting into at the time. It was perfect.