The New Sirens [A Mermaid TG Story] - Part 4 (Finale)

Commissioned by cooloo

Forty years after Charlie’s Sirens, a new vaccine allows merfolk to switch between genders more easily. Sam is secretly in love with his two roommates and when they start dating without him, he finds his gender in flux as his hidden desires are brought to the surface. 

Part 4

Devon watched the door as the final bell chimed and the lecture started. Still no Sam. He felt a hand on his tail and looked over to Alice, who shared his look of concern. 

“I don't think he’s coming.” She said, biting her lip. “Should we…?”

“Yeah.” 

Without a word, they quickly got up and swam out of the lecture hall, wincing as their lecturer gave them a stern look. If they’d been in Professor Kingston’s class, at least he might have understood. Devon shook the thoughts away; his attendance score didn’t matter right now, Sam did. 

“I feel like we’ve tried everything.” Alice sighed, fiddling with her bracelet as they swam. “We tried giving him time, tried forcing his hand, but he is so stubborn.”

“Yeah, but that’s part of why we love him, isn't it?” Devon smiled ruefully.

They both knew how Sam felt, of course. It was obvious; so obvious Devon felt stupid for not noticing it earlier. It was only when Sam had come home that day after he asked Alice to be in his pod that the first inkling began. There was something in the way Sam looked at both of them; he wasn't jealous Devon asked Alice out first, he was jealous of them both. The more he thought about it, the more obvious it became that Sam had a crush on him as well. Alice seemed to realise at the same time, and they had curled up together the night he’d given Alice the bracelet to discuss it. 

“He’s obviously feeling a bit conflicted; you know how males are. No offence.”

“Some offence taken. 

“Sorry, my point is, Sam needs time to come to terms with how he feels and his place in this pod. People are still a little weird about pods with multiple males; maybe that’s his hang up.”

“We’ll wait for him to come to us then. I hope it doesn't take him long, I feel like the three of us are a perfect pod already; what’s the harm in making it official?”

And so they had waited. And waited. Both of them had done their best to welcome Sam into their pod subtly, trying to show him they both wanted him around, but if anything, the actions seemed to have pushed him further away. The last few days, he’d barely spoken to them at all, and it made Devon’s heartache. Even if things didn't work out for them as a pod, Sam was still one of his best friends, he didn't want to lose him because he’d fumbled this. 

His bag brushed against his tail as they swam, he could feel the circle shaped lump in the side pressing against his scales. The coral bracelet. At the time, he’d told himself that buying two was the right choice so he’d be able to give the perfect one to Alice. Now he wondered if, deep down, he’d always known he wanted to give one to Sam as well. His heart thundered in his chest; if he did…would Sam accept it? 

They got back to the dorm, and Alice called out, only to be met with silence. They waited a moment before swimming down to Sam’s room and knocking on the door. Despite the silence, Devon could tell he was there. 

“Sam?”

“Go away.” Came a muffled voice from inside. It sounded higher pitch than normal and nasally, had Sam been crying?

Just the thought made Devon feel guilty.

“Sam, it's Alice and Devon,” Alice called gently. “Can we come in?”

“...Yeah, may as well. No point trying to hide anymore.” 

Alice squeezed his hand, and Devon pushed open the door. There was a lump on the bed, and the tip of a red tail poked out from underneath the blankets. A second later, it shifted, and Sam revealed himself, or rather, herself. Devon sucked in a breath, trying to keep his shock as minimal as possible. He could only imagine how embarrassed Sam must have been feeling, and he didn't want to make it worse, especially when there was nothing for her to be ashamed of. Nothing at all. 

“Oh.” Alice breathed quietly. “Oh, Sam, you should have said something.”

She rushed forward and pulled the blanket away before wrapping her arms around Sam warmly. Devon swallowed; Sam was…gorgeous. Probably the most beautiful mermaid he had ever seen, she was even more stunning than Alice, not that he’d ever compare them that way. Sam refused to meet her eyes but did return Alice’s hug. 

“I didn't realise this was what you were struggling with,” Alice said. “We thought it was because you wanted to join our pod.”

“I do.” Sam wailed. “I really do, I’ve had a crush on both of you for so long, but when you got together…I couldn't deny it anymore. My feelings for Devon kept making me feel so…female, and I kept transforming no matter how hard I tried to stay male.”

She sniffed.

“And now I have ruined everything. You two are happy together, and I am stuck as this busty mermaid!”

“Sam, you haven’t ruined anything,” Devon said gently. “We knew how you felt, we just wanted to give you time to come to us, when you were ready.”

“You knew.”

“Yeah, not about turning into a mermaid but…the rest.”

“And you…want me in your pod?”

Devon smiled and reached out to cup Sam’s now delicate face. 

“Male or female, Sam. You’re always welcome in our pod.”

“That’s right.” Alice smiled. “We’re family, always have been, always will.” 

Devon moved to Sam’s other side and hugged her, the three of them stayed that way, curled up tight together happily while Sam sniffled and got the last of her emotions out. When things were finally calm, Devon reached into his bag and pulled out the bracelet, presenting it to Sam in his open palm. She beamed ear to ear and wiped away tears before slipping it on. She admired it for a moment, then frowned.

“I’m not sure I feel female, though.” She said, 

“So what? Thanks to that vaccine, we can shift genders at will!” Devon shrugged. “Try now that you’re calm.”

Sam took a deep breath and closed their eyes, and a second later, the busty mermaid began to shift back into the merman they knew and loved. A few minutes later, a newly restored and male, Sam grinned at them. 

“I can change!”

“Of course you can, that block was all in your head.” Alice smiled. 

That gave Devon an idea, and he beamed, floating backwards a little and giving them both a wink. 

“On that note, I think we should do something special for our first time as a pod.” He announced. “It’s been a long time, but I wouldn’t mind being female again.”

~

Sam wasn’t sure what they were hearing; Devon wanted to be female again. Since when? They watched as their friend willed themselves to change; it had been so long they weren't sure what to expect. Alice snuggled in close to Sam as they watched their strong male slowly shift into a delicate, busty mermaid with scales that shone like gemstones. Sam felt their mouth go dry: this was the scene they had been dreaming of for years, Devon female, and Alice together with them as the pod leader. It wasn't permanent; they knew that, but that didn’t mean they were going to let the opportunity pass them by. 

Sam opened their arms and Devon swam right into them and just like that; the world was right. The three of them curled together, tails stroking one another as their hands roamed. Sam hefted one of Devon’s bare breasts in his palm while undoing Alice’s bra with the other. Both of their tits were so lovely in different ways, and Sam felt themselves getting obsessed. Alice’s were smaller, but firmer, and she made the most delightful sounds as Sam tweaked her nipples. Devon shuddered under their touch and Sam grinned.

“It’s been so long since I wasn’t in charge…” Devon moaned. 

“Submission suits you.”

“Oh….Oh, just don’t stop.”

Sam rolled and pinned Devon down onto the bed and Alice climbed onto his back. The blonde massaged their shoulders, and Sam could feel her scales move aside so that her pussy could rut against the rough scales of his backside. She moaned and shuddered against him; pleasuring herself as his cock emerged. Devon was panting now, his own pussy now exposed so that Sam could plunge inside. They wanted to take their time, but Sam had spent so long waiting for this moment they couldn’t bare it. 

They thrust their cock inside Devon’s new pussy and began to undulate, thrusting hard and fast, with shallow thrusts that never gave the ner mermaid time to recover. He was so tight and wet, it felt incredible, and Sam groaned. They floated in ecstasy. Alice was grinding herself harder and harder against his ass, letting the rough scales tease her as she spread her wetness all over. The three of them all rutted against one another, it was Alice who came first, squirting juices against Sam’s backside, then Devon who squeezed them so tight Sam fell over the edge as well. 

Sam couldn’t believe this was happening; they were in Heaven. Sandwiched between the two people they loved most in the throes of rapture. Life couldn’t get any better. 

“Oh fuck.” Devon groaned as Sam pulled out. “Female orgasms are so…intense. You should try it.”

The idea would have filled Sam with horror just a few hours ago but now it made him smile curiously. He’d seen the way Devon’s face twisted in ecstasy as he came; Sam had to admit they were curious. All those dreams about being fucked by a male Devon were about to come true, or so they thought. Sam let themselves change back, now ready to fully embrace being female and all the fun that came with it. They let their chest grow back to those enormous melons and let his cock disappear. Instantly, his new hole began to ache; it throbbed, remembering how good Devon had felt, and Sam shivered in anticipation as the changes finally settled over them. 

Devon looked them up and down with an eager, hungry look in his eye, his feminine features began to disappear only for him to stop mid-change and shudder. His eyes went wide as he looked over Sam’s shoulder. 

“I think it’s my turn,” Alice said, but she didn’t sound like Alice anymore. 

Sam turned and saw, to his shock, that Alice had turned male; now a well-muscled, blonde powerhouse with those same enchanting eyes. A wave of submission washed over Sam and Devon at the same time, and they whimpered; Alice’s domination was so strong, and it felt so good, a single look was enough to make both their pussies quiver. Devon was instantly female again, and they both let Alice wrap an arm around them. 

“If we’re going to play with gender, I think I should be on top for once.” She teased, slipping a single finger into Sam’s hole and making them see stars.

“W-whatever you want.” They whimpered.

“Good answer.”

It was Devon’s turn to rut at a male's back as Alice took Sam gently in her arms. She was so strong now, Sam felt instantly at home and ready to submit to her, despite his eagerness, though, he was still nervous. Alice seemed to sense it, and ran a gentle hand down the side of their face as she lowered them onto the bed. 

“Don’t worry, I know this is your first time as a female, I’ll take care of you.” She whispered. “Like a good male should.”

Sam could only nod, lips parted and wet as she slowly kissed them. It was so gentle and loving that Sam gave in immediately, scales sheath opening to welcome a thick length. Alice pushed inside so slowly, it felt lovely, no more than lovely, it felt perfect. Sam felt their passage stretch and squeeze around her, and they gasped, unable to keep up the kiss.

“That’s a good girl.” Alice cooed, “Feels good, doesn’t it?”

“Yes…yes!” Sam wailed.

Finally, the tip of her cock pressed against the deepest part of their new pussy, and Sam moaned, rolling their hips desperately. Alice pulled them up, so that they were fucking while floating upright. Devon appeared at Sam’s back and sandwiched them. Sam’s eyes rolled closed as Alice thrust, the pleasure only made stronger by Devon’s breasts pressing into their back. Devon kissed along Sam’s neck before slipping his hands down to fondle their breasts. Every part of Sam was being caressed and loved, it was too much. 

“Oh, Alice! Devon…I’m going to…Oh fuck I’m going t-to-!”

“Cum for us, Sam.” They whispered in sync, and Sam did just that. 

Alice continued to fuck him through the orgasm while Devon came against his tail. 

“Oh yes, Sam, just like that, keep cumming for us, baby.” Devon moaned. “We’re going to make you see stars every night.”

Finally, they all came down from the high and floated together, arms wrapped around one another and tails gently brushing. After a few minutes, Sam chuckled and snuggled closer to Devon;

“I’ll hold you to that. You too Alice.”

“Of course.” She replied, still in her strong male form. She laid a gentle kiss on Sam’s forehead, and they relaxed into the touch. Devon reluctantly broke away and rummaged around in his bag for a moment before pressing something into Sam’s hand.

“Normally, it’s the male doing this, but fuc,k what’s normal.”

Sam opened his palm to see the coral bracelet and blinked in shock. Of course, he knew they were a pod now, but a bracelet made it official. They slipped it on their wrist and blushed.

“Thank you…we’ll have to get you one if you’re going to be female again.”

“Only sometimes! It was actually pretty fun.”

“And I didn’t mind being male; not sure I’d want to do it every time though.” Alice mused.

“Who cares? We can choose; why pick one?” Sam grinned. “Come come here both of you.”

He opened his arms and the three of them snuggled together. Sam still wasn't sure if they were male or female. Maybe they were both. It didn’t matter though, Alice and Devon would love them no matter what, and that was what mattered. 

Epilogue

“Professor Kingston, thank you for joining us today! It seemed like we were only just talking to you about the miracle drug, and now you’re back in a whole new field, no less!”

“Pleasure to be back, and what can I say? Turns out an old fish can learn new tricks.”

“For those of you just joining us, Professor Kingston, normally an expert in the term of biology, has made quite a stir this last week in the field of sociology. Charlie, what do you have to say to all the merfolk out there who say a former human has no place writing about mermaid society?”

“I’d say that I am a perfect candidate. Not only have I been a merman for most of my life at this point, but as a former outsider, I notice these changes more keenly. And I can definitely say that as a result of my vaccine, mermaid society is changing at a rapid pace.

“Now that merfolk can more easily change between genders, we are seeing a rapid rise in gender-fluid members of our society. Pods are no longer limited to just a male and three females; in fact, I have observed many different kids of pods with my young students. Including one in which all members switch between the genders at will-”

“Sam! Will you turn off the TV already?”

Sam looked up with a start to see Devon floating over them, Devon was female tonight and had his hands on his hips. 

“Alice and I can't make up our minds. You need to be the tiebreaker.”

“Oh? What are we arguing about?” They grinned, switching off the TV and swimming up to embrace Devon. Sam was male at the moment and enjoyed the feel of Devon snuggling into their chest. 

“Who’s in charge tonight,” Alice replied from the bedroom. “It’s been forever since I was the male.”

“Me too!” Devon whinged. “Come on, Sam, who do you want to top tonight? Me or Alice?”

“What, you’re getting sick of me being in charge?” They joked, and the other two rolled their eyes. 

“Hmmmm, I think you both get a shot.”

“What? That’s a cop out answer.” Alice giggled. 

“Whoever makes the best impression gets to be the male for a week.”

“Oooh, high stakes.” Devon grinned. “I like it.”

“You two are so immature.”

“What? Scared you’ll loose, Alice?”

“Hardly.” She crackled her knuckles. “Come on then, let’s get to it. I am about to make you both see stars.”

Devon swam out of Sam’s arms toward the bedroom, giving Alice a teasing kiss on the way. Alice laughed and followed, waving at Sam to follow. Life together was perfect, more perfect then Sam could have ever imagined. Now they had the best of every world; male, female, Alice and Devon. Sam couldn;t have asked for a better life and it was all thanks to Charlie and his vaccine. 

“Sam! Come on!”

“Coming!”

“Not yet, you’re not!”

Sam laughed and swam after his lovers, ready for another night of passion and love with the most important merfolk in their life.