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MwaM; Ch 09: Who Let the Dogs Out?!
🕑 Added 2025-07-06 14:28:17 +0000 UTCAuthor's Note: Hello there, this is chapter 09 of Merc with a Mouth. I really hope you will like it.
Also, congratulations to our Guildmasters: Camo, I am Lord Dems, StormFox, RyanMK666, PenguGoesVroom, Hydrus Black and Darth Josh! 😇🥰
Now, without any further ado....Let's begin!
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Merc with a Mouth
-Dev Sagittarius Black
~~Chapter 09: Who Let the Dogs Out?!~~
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“See? Easy, right?”
Harry raised an eyebrow at the weird barrel tapping, which was actually the password to the Hufflepuff common room that was located in the lower levels of the castle. He had been told by Tonks that the sequence is changed every month by their head of house, Pomona Sprout.
From his point of view, it was stupid to have a single thing as the password for an entire month because any idiot with legilimency and an obliviation charm could get access to the common room and jeopardise everyone’s security.
It was actually funny how no one had done that and had maintained the false belief of ‘No one knows where other common rooms are or how to enter them.
He did, and if needed, he’d enter other common rooms as well. Also, he was quite sure that there were many who went to other common rooms, but they just kept silent about their ventures.
“Yeah, sure.” Harry nodded. “So easy that anyone could enter it.”
“Yet no one does.” Megan grinned as they stepped through the door.
“Obviously because—OOF!!”
Harry stumbled when he felt someone push him from behind, but he immediately caught himself and turned mid air to see his hound happily wagging his tail. He smiled and scratched behind his ear as he nudged his hand.
“Been waiting for me, eh?” He grinned. “Don’t worry, buddy, Harry’s here now.”
“That’s your dog, Carter?”
Harry nodded without bothering to look at the male who had asked, “Yeah.”
“Didn’t you read the rule book before joining? Dogs aren’t allowed.” The boy continued, “Only cats, owls, or toads.”
“So which one are you?”
“What did you say?!”
Harry sighed and turned to look, only to find several eyes blinking at him.
Apparently, his hound had made enough chaos to warrant the attention of the entire house, which also included Susan and Hannah. He frowned at that because he had specifically told Ghost to silently stay near his bed till he returned, and yet he was in the common room, which meant that something had happened behind his back.
“Who was the rule guy that had been speaking nonsense?”
“That would be me.” A blonde boy with brown eyes replied. “Name’s Zacharias Smith.” He folded his hands over his chest, obviously trying to intimidate him.
“So you do know you have a habit of speaking nonsense. Good boy.”
“It’s not nonsense.” Smith glared at him. “Dogs aren’t allowed in Hogwarts.”
“Says who?”
“The Rule Book”
“No, it says cats, owls, and toads are allowed. Dogs aren’t mentioned in it.”
“That means they aren’t allowed!” Smith raised his voice.
“Dumbledore has a phoenix.”
“He’s Dumbledore; he could have a donkey for a pet, and no one would question him.”
“I doubt he’d want you, but you can always ask him.” Harry shrugged. “Try to be polite, though. You seem to be lacking in that department.”
A few puffs started to chuckle, and Zach’s face went a bit red.
“Now, what’s your issue with me having a dog? Unlike you, he’s well trained and silent.” Harry smiled at the Border Collie. “In fact, I am damn sure that he was just staying inside the dorm room and hadn’t even bothered anyone, which means someone did something to make this an issue.”
Harry narrowed his eyes as a few boys started to shift a bit, looking guiltily as they realised that he was speaking truth. They had been the ones who had brought the hound outside. It had actually been Ernie who had entered the sixth-year boys dorm first and was surprised to see a dog in it.
“You don’t expect us to remain silent when there’s a dog in the dorm room, do you?” The Macmillan heir joined in. “We didn’t want to take chances, especially since he could’ve hurt any of us.”
“He's a dog, not a monster. A well-trained one, and all you needed to do was simply ignore him till I came and explained about him to you. There was no need for all this stupidity.”
It was at this moment that the common room door opened behind him and the head of the House, Professor Pomona Sprout, stepped inside through it.
“What’s going on here?” She asked and looked at Harry, who stood with his canine companion. “Is that your dog, Harry? I didn’t know you were bringing one.”
“He can’t stay away from me, professor, and the Hogwarts letter said that pets were allowed, so I brought him with me.” Harry nodded.
“It also states that the pet could be an owl, a cat, or a toad.”
“That’s what I’ve been telling him this entire time, professor, but I guess he thinks too highly of himself since he clearly said that he doesn’t give a shit about it.”
“Language, Smith.” Sprout frowned at the boy. “It’s the first night, and we have our first years here.”
“But professor, he was the—”
Sprout raised her hand, effectively silencing him, and turned back towards Harry. “Anything you’d like to say, Harry?”
“Only that the rule never states that these are the only pets that are allowed. It suggests that these are the usual choices,” said Harry. “And it’s clearly not the first time someone has gone around the rule, right? A friend of mine told me that the Weasleys had a rat as a pet for years before he went missing last year.”
Sprout nodded. “That’s a good point. The Weasleys did have a rat, and Minerva said that they had permission from the headmaster, so you’ll have to ask him to allow your pet to live with us.”
“That’s easy.” Harry nodded. “Though, can I do it tomorrow? I am sure the headmaster is quite tired with all the feasts and festivities, and I don’t want to disturb him for a small thing like a simple permission.”
That was bullshit. He just didn’t want to walk all the way from the basement to the third floor, and that too in a different tower. Hell no.
Sprout frowned a bit before she nodded. “Alright, but make sure to speak with him first thing tomorrow morning, okay?” She told him. “Also, if your pet does something tonight, you’ll be held responsible for it.”
“Absolutely, professor.”
“You can’t be serious!” Zach cried. “You’re letting him keep it for the night just like that?”
“I know what I am doing, Mr. Smith, and I would like it more if you put some faith in your head of house.” She frowned at him. “Now, I don’t want to hear about this anymore; I came here to meet our new additions, not to scold them.”
“Thank you, ma’am, I’ll take him from here.” Harry nodded. “Come, Zach, let’s go to our new dorm room.”
“You can go yourself, Carter.” Smith answered from behind him. “I don’t want to spend any more time near the dog than necessary.”
Harry turned to look at him and gave a small frown. “I wasn’t talking to you, idiot. I was talking to Zach.” He pointed at his dog.
“What do you mean by that?” Smith questioned him. “Your dog’s name is ‘Zach’?”
“Well, he’s actually named Zacharias, but I call him Zach for short.” Harry smiled. “He’s a good dog, and good dogs deserve a good name, right, Zach?” The dog nodded his head and happily followed after his owner.
“What the—” Smith blinked in shock. “How could a dog be called Zacharias?”
“Why not?” Harry shrugged. “There are dogs with names like Einstein, Icarus, and Darwin. What’s wrong with having Zacharias as a name? Is it a bad name?”
“It’s wrong because…because it’s just not used as a name for dogs!” He sputtered. “It's a human name.”
“Almost every dog name was a human name, Smith.” Harry sighed. “Now, if there aren't any more problems with Zach, I’d prefer that you keep your mouth shut.” He completely ignored the blonde and went towards the door that had ‘BOYS DORMS’ written on it. “Come, Zach. You are a good dog, right? Who’s a good dog? Yes, yes, you are!”
Zach turned to look at the stunned blonde boy who had forcefully pulled him out of the dorms and, to everyone’s surprise, made a noise that was eerily similar to a laugh before following Harry through the door.
Everyone was silent for a few seconds before the entire common room burst out laughing at the incident. Zach tried to glare at everyone, but even his head of house was smiling, and he couldn’t do anything but plop on the sofa chair.
Usually he’d have left the common room, but it was almost curfew outside, and that other Zach and his bloody owner were in the dorms. So, the unfortunate blonde was forced to endure the torture where everyone, including his friends, the first years, and even his head of house, laughed at his expense.
⁂
Twin emerald orbs opened in the darkness of the dorm room, and Harry slowly pushed away the yellow and black curtains before leaving his bed. He looked at Ghost, who immediately took his place under the covers.
The mercenary swiftly stunned the four boys before he left the room and went towards the girls dormitories.
According to Tonks, Hufflepuff and Ravenclaw were the only two houses that didn’t have the stupid rule of boys not being able to enter the girls dormitories. The claws believed that intelligence must not be limited to borders, and the puffs just didn’t care much.
This also meant that the only reason why the Hufflepuff girls weren’t pregnant was either because they had lots of anti-pregnancy potions or the boys were wimps.
Either way, it was good for him because he had some work to do regarding a certain redhead, and night time was the best time to do it.
Harry slowly approached the sixth-year dorms and was surprised to note that the door led to a long corridor with multiple painted black doors. Harry reached for the ones that had golden plaques on them and saw the names Hannah and Susan Bones on one, while the next one had Megan and Leanne.
‘Girls get personal rooms while boys sleep in a fucking dorm….’ Harry shook his head but didn’t say anything as he went towards the first door.
It took him almost half an hour to draw the protection runes on the door. He had even added a few of his own creations that were made to attack the intruders. The door had been laced with a few lightning runes, three blasting ones, and a safety lock that would sense the intent of the intruder and seal the door unless unsealed from inside.
Finally, he drew the eye rune at the top right of the door near the hinges, which would hide all other runes and make the door seem normal.
‘That should do it.’ Harry wiped the sweat from his brow. ‘Tomorrow I’ll finally meet Susan, and then I’ll make sure to be included in her group.’
He was about to leave the corridor when all of a sudden the door was opened, and Harry came face-to-face with the beautiful face of a surprised Megan, who was wearing nothing but transparent black nightwear that left little to the imagination.
“Ha-Harry?” She blinked. “What are you doing here?”
“I…” Harry tried to think of anything, but all he could come up with were stupid ideas to pull a prank and run away or knock her unconscious and obliviate her. Something that he didn’t want to do.
“Yeah? Did you come here to meet me?” The girl smirked. “How long have you been standing here?”
Harry slowly smiled back at her. “Just a few minutes.” He shrugged. “I didn’t know you got personal rooms.”
“It was done for us girls by Headmistress Derwent back in the 1700s.” She smiled.
“Neat. I wonder when Dumbledore would do something like that for the boys as well.” Harry sighed. “It’s tough to sleep with all the snores.”
“Awww....don’t worry, Harry, you can always sleep with us girls here.” She giggled. “I’m quite sure Leanne wouldn’t mind that much.”
“Megan, sweetheart, I have a problem with sharing beds.”
“Problem?”
“Yeah.” Harry nodded and leaned down to whisper in her ear. “If I share a bed with a gorgeous girl, neither of us is able to sleep.”
“Mhmmmm…..that doesn’t sound like a problem to me.” Megan smirked as Harry’s hands snaked around her waist. “I’d like to test that statement soon.”
“Sometimes it’s good to be curious, isn’t it?” Harry pulled her closer as his lips started to pepper kisses down her neck.
Megan started to breathe heavily; she held onto Harry’s arms as his own roved around her body. “Ha-Harry…” She whispered. “I—mmphmmm…..” But that was as far as she got before Harry’s lips captured hers and she lost control of herself.
For the next few minutes Harry enjoyed tasting Megan’s lips as his hands squeezed her ass while she moaned. He swiftly picked her up, and her legs immediately locked around his waist as their tongues wrestled each other for control.
Finally Megan got enough control and pushed him away for a few seconds. “Har..Harry…” She panted. “Open one of the unused rooms. NOW!”
“These are yours?”
“We use them for many things.” She nodded before adding. “And it’s not like anyone’s living in them anyways.”
“Lucky you.” Harry grinned before wiggling his fingers to unlock the door with a nonverbal and wandless Alohomora.
“Wandless magic?” Megan whispered in surprise. “They haven’t taught us that yet.”
“Guess that’s the second thing I can flex about.” Harry said before taking her through the door.
“Second?”
“Be a good girl and you’ll find out the first one soon enough.” He grinned as he locked the door with his personal seal.
“And what if I’m a bad girl?”
“Then…” Harry smirked. “You’ll be punished.”
Megan blushed but didn’t say anything as Harry walked inside the small room with two beds and sparse furniture. Hufflepuff’s emblem was on one wall, while the other one had the school’s crest.
The two didn’t waste even a single moment as they removed their clothes. Megan’s eyes widened in surprise when his chiselled physique came into view. Thick arms and mile-wide shoulders along with huge pecs and abs that were so deep that she could lick between the gaps. There was also a large tattoo of an open-mouthed dragon that covered his chest.
There were a few scars on his torso—one particularly deep gnash that ran down his right thigh—and yet all she could do was bite her lips as her ovaries exploded when her eyes fell on his thick, fat, veiny cock that was accompanied by two large plum-sized balls.
“What the—” She whispered in shock. “How can that even fit inside a girl?”
“It has before.” Harry replied smugly. “It will tonight.”
“Oh?” Megan looked at his face. “So you’re not one of those shy first-timers who I could entrance with the curve of my tits?” She gently leaned forward, holding her C-cups, and gave them a small squeeze before rubbing her pink nipples that stood rock hard for attention.
Harry’s semi-hard cock bobbed like a pendulum as he approached her. “I don’t think I need to be a first-timer.” He kissed her again as his right hand went around her waist while the left cupped her boob. “To be entranced by these.” He mimicked her squeeze and smiled as the girl went for his cock and started to stroke it.
The merc pushed her on the bed, falling with her as they kept on kissing. Megan whimpered as his hands started to roam on her body while he peppered kisses down her neck and went on till he reached her navel.
Harry looked up and saw her whimpering; his hands reached forward and wrapped around her boobs before his fingers pinched her nipples. He licked her navel, giving it a wet kiss before she parted her legs and he went down on her.
The boy noticed that there wasn’t even a single hair around her pink lips; he touched them and smiled when she trembled. His tongue wetted his lips before he leaned down and gave the girl’s pussy a wet kiss, internally smiling when she gave a loud moan in pleasure.
His tongue parted her outer lips and slid inside as she reached down to hold his head, her fingers moving through his hair as Harry’s hands held her thick thighs.
“Fuckkkk yesssss!!!” Megan moaned, “So gooood…”
Harry’s left hand reached upwards for her funbags while his right rubbed against her pussy. His finger penetrated her, making her moan louder as he looked up and smirked at the moaning mess.
“You taste fucking delicious.” He said, looking straight into her eyes as he dipped his head again.
“Fuck, that’s so hot!” Megan cried as another finger joined inside, and Harry started to pump his fingers inside her.
“Get ready for more.” Harry grinned and focused his attention on the little nub that had revealed itself just above her pussy. He wrapped his lips around it as his fingers kept on pumping harder.
“HarryyyYY!!!” Megan gave a loud moan.
The boy pictured a snake in his mind and immediately started to speak Parseltongue as his tongue vibrated against her clitoris.
“FUCCKKKKK!!!” Megan screamed. “FUCKFUCKFUCK!!!!”
Harry’s fingers found a small rough patch inside her, and he rubbed it harder while continuously assaulting her clitoris with his tongue.
The beautiful witch arched her body, her thighs clamped around his head as she screamed his name as her walls squirted juices all over his fingers and the bottom of his face.
“FUCKING HELL!!!” She screamed as her body kept on twitching in the aftershocks while Harry drank all of her cum.
It took Megan a few minutes to return from her orgasmic bliss, and she ferociously kissed him back, tasting herself on his lips and moaning as his hands wrapped around her boobs once more.
“So—” Harry began, only to be stopped by her.
“Shut up! I don’t know what it was that you did or how you did it, but I swear to fucking kill you if you ever stop doing that!” She grinned, her eyes alight with excitement. “I don’t fucking care who else you fuck, Carter; all I know is that I. WANT. THAT. AGAIN AND AGAIN!”
“Oh yeah?” Harry grinned. “What will I get in return?”
Megan smirked back at him and wrapped her fingers around his thick phallus. “This bad boy has been hard for quite some time.” She leaned forward and kissed him.
“Maybe you should do something about it.”
“You’re really big, you know.” She murmured against his lips, “I don’t know if it’ll fit.”
“And what if it doesn’t?” Harry asked her, his cock twitching in anticipation, waiting to enter her. He didn’t exactly care much for her reply; he knew she wanted him, and there was no way he was going to leave the room without making her his.
The brunette swallowed hard, her eyes slowly getting a new resolve. “I’ll make it fit.”
“Good girl.” Harry smiled as he sat on the bed and parted her legs. Grabbing the base, he released it from her grip and wiggled his fingers to conjure some lube that coated his shaft.
“What are you doing?”
“Helping you.” He winked at her before rubbing the bulbous head at the entrance. “I hope this isn’t your first time?”
Megan shook her head, “Don’t worry, it’s nooOOOOOTTTTT!!!!!”
The brunette cried in pain as Harry decided to push the entire head past her entrance in one go. He groaned at the immediate tightening of her cunt, the muscles massaging his head as he pushed inside her love canal.
The brunette witch panted, trying to calm herself as he kept on pushing inside her. She moaned when Harry’s massive cock started to fill her to the brim. “Fucking hell! You’re big, Harryyyy!”
“You’re fucking tight!” He groaned, feeling the hotness that was wrapped around him swallow his member in a warm, inviting hug.
‘And to think this is our first night here…’ Megan thought, as she pushed against him, delightfully moaning as her pussy drooled all over Harry’s dick. ‘I’m so going to fuck you throughout the year, Harry….so…fucking…. “Fuckkkkk…!!”
Some girls saw big fat cocks as a bad thing, worried that it would hurt them too much or rip them apart….maybe they’d even die. Megan thought of it as a good challenge, and she was even ready to die for it.
‘Dying because of a fucking huge dick inside you…..’ She smirked, ‘Good death.’
Finally the gorgeous puff gave a loud moan as Harry bottomed out inside her, pushing past the delightfully snug canal and hitting the entrance to her womb. Megan looked down, and her brown eyes widened in shock when she saw the way her lower abdomen had bulged out a bit.
Harry smiled at her, his strong hands supporting her fleshy thighs before he pulled back and slammed back into her in a way that made her see the stars.
And then he did so again and again and again, making sure that she felt every single stroke deep inside her pussy.
The merc groaned deeply in satisfaction as he pounded her. It had been quite a long time, and his tiny tryst with Ginny in the coach had gotten him all riled up without any release.
The release that he was going to get through the delightfully delicious puff that was Megan Jones.
“Fuck fuck fuckkkk!!!” Megan moaned. “You’re so fucking goooodd!!” She raised her arse and reached down to hold her legs for him.
Harry took the moment and cupped her funbags that had been tantalising him with their pendulating movement. He squeezed them hard, making sure to roll her nipples before he slapped them.
“Fuuuckkkk yessss…” Megan loved the dominance; she moaned as he mauled her tits and lifted her legs higher while pushing back against him to match his rhythm.
The merc grunted as he rapidly pumped his fat shaft in and out of her, their thighs colliding with each thrust. The room was filled with wet, rhythmic slaps of flesh, as Harry enjoyed watching the plethora of expressions that crossed her face.
He released her boob and caressed her dark brown locks that were sprayed on the bed, the slight sheen of sweat that glowed on her forehead, her flushed red cheeks, and her slightly watery eyes that were dripping with lust as she kept on kept on moaning….it was at that point when Harry decided to fuck Megan throughout his stay at the castle.
She was just too fucking gorgeous to stop at just one night.
“Wha–ah fuck!” She grunted. “What are you looking at?”
“You’re beautiful.” Harry breathed. “I don’t think I’ll be stopping after tonight.”
“Try it and see…..what…fuck that’s so good!” She closed her eyes as she pushed back. “See what happens.”
He chuckled before returning his attention back to her tits that were akin to large teardrops in shape. He could spend hours squeezing them, watching them overflow between his fingers as he made her moan.
“They’re good, aren’t….they?” She gasped out, smiling as he nodded. “Family trait…” She grunted. “A-All of Jones' women….have huge tits.”
“Interesting.” Harry replied, “Mind if I check that later?”
Despite the situation, she giggled, “You’re fucking a girl and telling her that you want to check out her sister’s tits?”
“Do you not want me to?”
“I do….” She closed her eyes, moaning as images of Harry fucking Hestia and Gwenog filled her brain. “Imagine fucking all of us….I—” She blushed, “I’d…..love for my sisters to join.”
Harry grinned; that was something new. And if her sisters were anything like her, he could clearly see himself fucking a slightly older Megan.
“Maybe someday.” He smirked, leaning down and folding her as his cock started to push harder against her womb.
“Ohhh! FuuucKK!!” She cried, “Fuck Harry, that feels good.” She breathed, looking up as she panted.
The boy leaned closer, making sure she was watching as he wrapped his lips around her nipple, swirling his tongue around the hardened nub as she started to moan louder. His next word came out in parseltongue. “Cum for me.”
Megan screamed, her vision started to blur, and she shivered in rapture as her core tightened and started to squeeze his cock more. Coaxing it to coat her insides with his baby batter. The beautiful puff arched her back as she wrapped her arms around his head, pushing her boobs in his face.
“AAAAAGGGHH!! HaRRRY!” She squealed, shaking as her hands grasped his hair and dug into his scalp.
Harry began to fuck her hard like a possessed beast. His massive cock pounded into her drooling cunt, his balls slapping against her arsehole. With a glance down, he could see the outline of his huge cock as he continually thrust into the beautiful brunette.
“Harry! Harry! Harry!” Megan kept on chanting his name, “OOOOOOH! FUCK FUCK FUCKKK HARRYYYYY!” She locked her legs around his waist and screamed hard as finally the knot snapped open and her walls started to flood her cunt with her juices. “FUCK FUCKK! FUCK!”
Harry gave another grunt as he could feel the base of his cock tightening further, his own release getting closer as he started to thrust harder into her begging walls.
Megan became a sweaty, moaning mess as he focused on his own release. It was a beautiful sight, and her beauty along with the sounds she made egged him on.
Ultimately, with a loud groan, he slammed deep inside her, his fat cock pushing as much as it could before his balls began to churn and white-hot seed surged out from his cock, coating the walls in his baby batter and filling her cunt to the brim.
“S-So fucking goooood~” Megan moaned, almost in a trance, as she tightened her arms and legs around him. “M-More! All of it. Fill me, Harry…” She cried, “Make me yours….I'm all yours….”
Finally, after a few minutes when Harry stopped pumping, he slowly got up and gave her a soft, lazy kiss that was different from the strong, passionate ones they had shared before.
“That was good.” Megan smiled. “I loved every second of it.”
“Was?” Harry blinked. “Remember what I had said, love? We aren’t sleeping anytime soon.”
Megan’s eyes widened when she felt him move inside her, and it was at that moment when she realised that he hadn’t even gone down after his release.
‘What kind of beast have I released?!’ She thought before moaning as Harry kissed her once more, ‘Well…lucky me then.”
That night, none of them slept till it was four in the morning, and Harry was thankful that his seal on the door prevented any noise from leaving the room, or else he was sure that he'd have been kicked out of Hogwarts.
Finally, Megan was too worn out to keep up anymore, and Harry wiggled his fingers to clean them both before they fell asleep together.
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Ending Note: There we go! If you felt that the ending was a bit rushed, then keep calm because i'll expand it a bit later and will tell you about the changes in the next update.
Image: Megan Jones.
Liked it? Loved it? Needs some changes? Please, do tell.
I am waiting for all your comments. Constructive criticism is always appreciated.
Thank you for reading and your comments,
With regards,
Dev Black
Comments
Dev Sagittarius Black
Thank you!
Dev Sagittarius Black
Yeah, the smut was supposed to be more. But that's not something I can write without the mood so I cut it short.
DarkLightning34
Great chapter, I do feel like the ending was a bit rushed, but I'm excited to see what comes of it in the next one
I am lord dems
Nice
