The New Sirens [A Mermaid TG Story] - Part 3

Commissioned by cooloo

By TheSpiralledEye

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 3

Existing as a male had never been a struggle before now. In fact, Sam had never given it a second thought; now, he went to bed each night exhausted after struggling to keep himself from changing each day. Just being around Devon and Alice was enough to make his scales tingle, and his cock threaten to disappear in its sheath. His skin felt like it was crawling and often it was, threatening to smooth over entirely. The week dragged on, and Sam found that the only way he could get peace was to eat breakfast and rush off to class as soon as possible. The more time he spent away from the happy couple, the better. 

The only problem was that Alice and Devon noticed and constantly tried to include him in whatever they were doing. Even sitting in a lecture hall next to Devon felt like torture. They had done this hundreds of times over the years, maybe thousands and yet now it was pure torture. Sam swore he could feel the heat from Devon’s body wafting through the water against his skin. They weren't even touching; his whole body felt like a live wire. He was actually glad when Professor Kingston told him to stay behind after class. 

“Do you want us to wait for you?” Alice asked, reaching out to touch his shoulder before Sam flinched away.

“No, it’s fine, you two get going without me.” Sam swam up to the professor as quickly as he could, trying to calm his breathing. 

Professor Kingston waited until all the other merfolk as swum out of the room before fixing Sam with a concerned look.

“Are you alright, son?” 

Son. A male term. Male. Because that’s what he was and what he always would be. 

“I’m fine.”

“You’re staring right through me during lectures, I can tell you’re not listening.”

“Maybe you’re just a boring lecturer,” Sam said, crossing his arms defensively over his chest and trying to take comfort in how flat it was. 

Professor Kingston just chuckled. 

“I know male posturing when I see it.” He said kindly. “And I know when a male is…overcompensating. Are you struggling, maybe, with your identity?”

“No! I am struggling because your stupid vaccine doesn’t work properly!” Sam snapped. “I’m male, I’ve always been male, and now…now my body has decided I’m not! Your vaccine was supposed to stop that!”

“Sam-”

“Weren't you the one on TV saying that the vaccine helps people properly express their true selves? Well, I am struggling to keep my true self!”

“Sam.” Professor Kingston repeated, laying a gentle hand on his shoulder. “The vaccine does work, you’re not the first merman to struggle with subconscious desires.”

“S-subconscious desires? You’re saying I want to be female? T-to be all submissive and busty and part of Devon’s pod?”

“...No, you just did.”

Sam’s cheeks burned a red colour that almost put his scales to shame. 

“Only because you implied it! You know what, professor, maybe you should just stay out of my business.”

The professor floated back, hands up defensively.

“I won't pry any more if that’s what you want, but I think you should talk to somebody. Maybe your friends, they’re worried about you.”

“They are?”

“I see the way they glance about, looking concerned instead of listening to my lectures.” He joked. “Talk to them. I am sure they won’t judge.”

“That is literally the exact opposite of what I want to do.”

“Want and need are two different things.”

“If you weren’t an old man, I’d punch you.”

“No, you wouldn’t.”

“What? You think I’m not man enough!”

“No, I think you’re a good person who wouldn’t hit his professor or even threaten to if he wasn't under so much pressure.”

Sam bit his lip and turned away, rushing out the door. He didn't want kind words and understanding right now, he wanted Charlie to yell, to say ‘bring it on’ so he could prove how many he was in a fight or something, even if that wasn’t really in his nature. He swam, without having a destination in mind and furiously undulating his tail to try and get rid of this nervous energy. Eventually, he found himself at one of the many coral parks near Atlantis University and flopped down on a sand bed. Fish swam from pillar to pillar around him; lucky little things. They didn’t have a care in the world.

“Sam?”

His head shot up in the sand.

“Alice?”

“Oh, thank goodness, I have been looking for you everywhere.” She smiled, swimming down and floating next to him. “Devon and I have been so worried.”

“You were both worried about me?”
 “Of course, we have been for a while. You’ve been acting so strange lately ever since…” She bit her lip. “Ever since Devon and I started dating.”

Sam pressed his lips into a thin line.

“It’s just a lot to get used to, being three friends and then suddenly a couple and a person on the side.” He lied. “I’m fine, I promise.”

“But we keep trying to include you, and you spur us.” Alice frowned. “We are your friends, Sam. You shouldn’t lock us out. Devon is half-mad and panicking, looking for you right now.”

A familiar tingle shivered down Sam’s spine.

“He is?”

“Yeah, when you didn't come to class, we went back to Professor Kingston’s room, and he said you swam off after you and he had an argument? He said we should talk to you.”

“This isn't any of his business.”

“You’re right, but it is mine, isn’t it?”

Alice leaned over and placed a hand over his. 

“Sam…if there is something you want to tell us, Devon and I will listen, I promise.”

“Of course we will!”

Sam felt his shoulders tense at Devon’s voice as it approached. He turned just in time to be knocked back with the force of a hug he wasn't prepared for. All of a sudden, Devon’s arms were wrapped around him tight, their chests were pressed together, and his hair was tickling Sam’s lips. In an instant, his blood was on fire. Devon pulled back. 

“Look, man, I’m sorry. Obviously, we shouldn't have let you stew, we just thought we should let you come to us when you were ready.”

All his sneaking around and hiding hadn’t even worked? God, that was pathetic. Sam swallowed, eyes running over the concerned faces of his two friends. He could see how much they both cared for him, and his skin was still warm from that hug. He wanted nothing more than to break down and admit the truth; he wanted Devon to open his arms again so he could swim into them and feel safe and secure. He wanted long hair for Devon to stroke as he submitted and let his new male take care of everything. That tingling got stronger and Sam knew what was about to happen; he refused to let it, no matter how much a certain part of him wanted it. 

“Look, I appreciate what you guys are doing, but I am just…adjusting.” He said through clenched teeth. “Just give me time.”

“Sam, you look like you’re in pain,” Devon replied, reaching forward again.

Sam swam back, ignoring the part of him that wanted to take that hand and place it against his cheek. Holding back the change was getting harder and harder; he had to get out of here. If he transformed into a female in front of his two best friends in a public place, he might just die from mortification. There was only one way to make them leave him alone.

“Look, just give me some space, okay!?” Sam yelled. “Go make out or something, I don't want to see you acting all lovey-dovey. Far out.”

Both Devon and Alice looked hurt; which stung, but it was the only way to make sure they didn’t follow him again. He turned and swam as fast as he could, trying to get back to the apartment before the change took hold, but it was no use. In a panic, he rushed into an alley between two large stone buildings just in time as his breasts began to swell. With a groan, he felt them push out, and his cock disappear once more. This time, he was even more curvy than Alice.

“Fuck, fuck, fuck!” He moaned. 

The change couldn’t even give him the dignity of being quick, it was slow and sensual. Muscles stretched pleasingly, and he felt a sigh of pleasure escape his mouth. It felt right, like this was what he was supposed to be, and that was the scariest part.  He curled around himself, trying to give his chest as little space as possible to expand,  but of course, it was no use. 

“I thought these changes were supposed to happen slowly over hours or days.” He muttered. “Stupid vaccine.”

His voice was musical and light now; it actually sounded quite nice. 

“Miss, are you alright-oh my goodness!”

A voice made Sam whirl around and quickly try to cover himself, something that was easier said than done. He wasn’t used to these new breasts; they were even bigger than last time. 

“Goodness, I am so sorry, miss. I didn’t mean to see you!” The older gentleman mermaid said, covering his eyes. “Flo, quick, do you have something in any of those shopping bags for the girl?”

An older, mature merwoman appeared, arms ladder with shopping bags. Her face was sympathetic as she looked Sam up and down; he wasn't sure what to say. 

“It’s alright, dear, I understand if you were in denial and got caught.” She said sweetly, reaching into her bag and fishing out a seaweed crop top. “This was going to be a gift for my niece, but I think you need it.”

She knew he was a newly turned mermaid, but somehow that made things even more embarrassing. She handed him the shirt, and he took it in one hand, feeling awkward.

“I don’t know how to put this on.” He whispered. “And I don't want to.”

“Want and need are two different things, I’m afraid, sweetie.”

That was the second time today he’d heard those words; they weren’t any more helpful the second time around. The older mermaid had him hold his tits in place while she tied the shirt around them and cinched it closed. The pressure pressed them together and Sam could only stare down at the ample cleavage in bewilderment. That was his cleavage. 

“There we go, miss, all decent again.” The merman grinned.

Miss. 

“You really didn't need to, I will change back in a few minutes.”

The woman gave him a pat on the cheek.

“Just in case, then.”

Sam could tell from her tone she didn’t believe it. Sam watched them go and looked back at his body, his fingers traced over the hourglass figure, trying to will it away but finding it stayed in place. The seaweed crop top was pretty cute, it suited his complexion and showed off his figure all the more. Sam wished it were ugly, it would be easier to hate it then. 

“Come on, change back!” He whispered in a panic. 

A flash of colour caught his eye, and he turned; in his panic, he had wandered back out onto the street and his tails had caught the light, reflecting in the store window. Sam stared at his own reflection; his features were even softer this time, and his build was more delicate and curvy. It seemed that every time his control slipped, he was turning into a more feminine mermaid. 

“What will I look like if I keep this up?” He muttered. 

He could only imagine how much more curvy and feminine he could get. Soon, he’d look like those mermaids on the billboards advertising make-up and the latest seashell bra. The horror at being stuck slowly faded, replaced with curiosity. He ran a hand through the gentle brown locks that flowed just past his shoulders. They were wild and untamed now, but he could imagine how they would look done up in shells and coral bands. His features were cute, pretty even. This body wasn’t bad really it just….wasn’t supposed to be him. 

The tinkling sound of bells came from his bag, and Sam drew out his communication shell. 

“Devon…”

The caller ID taunted him; Sam had never felt so torn. On the one hand, he wanted to answer and let Devon’s voice soothe his stress. A wave of submissiveness that came naturally to all mermaids washed over him, compelling him to answer and let a male sort this out. But those words from his professor and the older merwoman echoed in his mind; want and need were different things. He wanted to talk to Devon, but that wasn't what he needed right now. Not if he wanted to change back. 

He focused all his mental energy on thinking male thoughts, trying to picture his normal male body in his mind. He swam furiously back towards the campus, hoping nobody would recognise him; a silly thing to think about; nobody would ever suspect this busty mermaid of being a man. Let alone him. By the time he reached campus, his efforts were starting to take effect. He felt the top start to get looser and looser until it finally shuffled down around his hips. After a few minutes more, then thinned as well and with a few flicks of his tail it was gone. Sam turned, watching the fabric float in the current, threatening to disappear forever. 

“That woman did buy it…” He rationalised. “Maybe I could give it to Alice.”

He snatched it out of the air and ignored that strange sense of loss he had now that his chest was flat and bare again. 

~

Sam was in the coral park again, desperately looking for something. He wasn’t sure exactly what it was, only that he needed it. As he swam, he caught a glimpse of himself in the smooth sea glass that was jutting from the ground and paused. He was himself but…different. His face was softer, still male, but oddly androgynous. His hair was short, but soft and silky, with enough length to float above his head. He was still male, but barely.

“You know, I think you should give this up.”

He turned to see Alice looking at him with a pitying expression on her face. It was the same look you gave a child trying to reach a shelf everybody else could tell was too high. 

“What do you mean?” 

“Being male, it’s obvious you should be female.” She said simply. “I mean, look at you. Never really been very masculine. You’re only fighting the inevitable.”

“N-no! I’m not!”

But even as he said it, Sam felt his body shifting again. Bouncy breasts growing, long hair cascading down his back, cock disappearing. The sensations had all become familiar now, and he could do nothing to stop them. In the blink of an eye, he was female again.  This time, no matter how much he tried, he couldn’t change back. He felt frustrated tears burn at his eyes. Alice watched him with pity but nodded her head.

“See, isn’t that better?”

Sam didn’t get a chance to answer, another voice cut in.

“I think so.”

A figure appeared: Devon. He swam confidently forward, and Sam found himself frozen in shock. Devon smiled and Sam felt butterflies forming in his stomach; no, her stomach. 

“You’re such a beautiful mermaid, Sam,” Devon whispered. 

Sam felt her mouth go dry; behind its scale sheath, her pussy was getting wet. God, she was so horny, and all the panic was melting away now that Devon was here to take care of her. 

“Shhhh, it’s alright, I will protect you. That’s what a male does.”

“Yes…” She trembled. “But…I’m not supposed to be this way.”

“Yes, you are.” Devon cooed. “You’re perfect. Let me show you how perfect you are.”

It was then Sam realised she was naked, and Devon’s hands traced down from her face to caress her large breasts. They were heavy now, she wasn't even sure what the cup size would be. Devon’s touch felt so good, and she instantly submitted to it. 

“That’s it…” He whispered. “Moan for me…”

“Devon….” Sam groaned. “Oh fuck, Devon, don’t stop.” 

“Don’t worry, I won’t.”

Sam couldn't even bring herself to care that Alice was watching, this submission to her male felt too good. Devon’s arms wrapped around her body, pulling them together so that their tails began to undulate. The scales of her sheath pulled back, exposing her pussy to the water and then, something warm and hard entered her. It was a pleasure like nothing she'd ever felt. Devon slowly began to thrust into her; his movements were gentle and loving. With each one Sam felt her resistance fading away and submission taking over her mind. Devon was her male. She wanted nothing more than to let him take the lead, to make love to him, to cum for him…

“Ahhhh!” Sam’s eyes shot open as he moaned; pleasure overwhelmed his body as an orgasm ripped through it. He felt his pussy throbbing as he squirted into the water, and his whole body quivered at the intensity. 

When he finally caught his breath, he blinked and realised he was in his own bed. It had all been a dream, a dream so intense he’d actually cum. His pussy continued to throb as rational thought returned, and Sam realised…he was female again. He’d been so taken by surprise with the orgasm he hadn't registered that he shouldn’t have had a pussy at all. 

He sat up and instantly groaned at the weight on his chest. Mermaids were naturally busty, with chests much larger than the average human, but this was something else. His tit were huge, and the nipples were still hard from the orgasm. In shock, he ran a hand over the melons, feeling their sensitive, soft flesh. His waist was cinched in, and his hips wider. Child bearing hips, one might say, and the thought made him flush. 

He moved his hands to his head and traced through the long locks of hair that cascaded down his body. This time, they reached his waist, framing his perfect figure. Even his tail had changed; the frons were longer, and more delicate, and his scales felt smooth and soft. Everything about him screamed classic mermaid: curvy, beautiful and submissive. He was the sort of female that males dreamed of having one day. 

“This is getting out of hand,” Sam muttered.

A quick glance at the clock showed he only had an hour before class was supposed to start. That should have been plenty of time to change back; sure, yesterday had been a struggle, but he managed it in the end. But today, no matter how much he tried, he couldn’t even make his chest shrink a little. Let alone grow his cock back. He was utterly stuck. 

“N-no!” Sam felt tears start to burn behind his eyes. “What am I supposed to do!?”

He sat himself down on the bed with his head in his hands. His palms were soft and smooth now; his body delicate and female in every way; what was worse, it felt right, like this was the body he was supposed to have. He didn’t want to want it, though. Sam felt like he was at war with himself, and he had no idea what to do next.