Troy awoke with a yawn and stretched as he rose from the floor of his undersea cave. Troy was a merman with neck-length dark green hair and an emerald-green tail. He had a lean build with some slight muscle and fair skin. He had just moved into the cave yesterday. He had been travelling for a long time and was glad to finally have a place to call his own. He swam out of the cave and into the open water. He saw a school of fish swimming by and decided to follow them for a while. He thought one or two might make a good breakfast. But Troy came to a halt when he was suddenly hit with strange sensations. A haunting wordless song echoed in his ears and he felt a hard throbbing in his loins.

Troy had never felt anything like this before. He felt strangely drawn to the song and decided to follow it. He swam through the water, following the song. He swam for what felt like hours, but he didn't care. He had to find the source of that song. He didn't know why he was so drawn to it, but he couldn't resist. He swam past coral reefs and kelp forests. He swam through schools of fish and past sleeping sharks. He swam until he came to a clearing in the coral. And there he saw her.

Melody was a mermaid with long silky blue hair and a deep blue tail. She had pale skin and an hourglass figure. The only garment she wore was a dazzling rainbow seashell top over her massive breasts. She reclined on a flat rock, letting out a soft siren song. When she noticed Troy gazing at her, Melody stopped with a gasp. She quickly regained her composure and let out a soft giggle. The mermaid righted herself and floated upwards to give Troy a better view of her body.

Troy felt the throbbing in his loins intensify as he approached her. His eyes were fixated on her large breasts. He swam closer to Melody, unable to resist her beauty. She smiled at him and extended her hand. But as Troy reached for it, Melody suddenly swam off. She playfully stroked his chest with her delicate tail fins as she darted into a patch of tall seaweed.

Troy chased after her. He pushed through the swaying fronds, catching glimpses of her shimmering blue tail. He could hear her soft giggles echoing around him. Her siren song had stopped, replaced by the sound of her teasing laughter. Troy was determined to catch her. He swam faster, his powerful tail propelling him through the dense seaweed. He needed to have her.

Troy emerged from the seaweed into a secluded grotto, dimly lit by glowing algae. Melody was floating in the center with her hands on her hips and a coy smile on her face. As soon as she was certain Troy could see her, Melody lifted up her arms and began a belly dance. While Troy was enthralled by her performance, Melody deftly brought her hands behind her back and undid the knots holding her top on. As she brought her arms back out, the rainbow seashells fell off and gently drifted down to the grotto floor. Freed from their restraints, Melody's firm, luscious breasts were on full display, the pale orbs topped with delicate pink nipples.

At sight of Melody's magnificent breasts, Troy could no longer contain himself. From where his human half and fish half met sprang a 30-centimeter-long penis, fully erect and with large testicles at the base. Now it was Melody's turn to be enticed as she gasped and marveled at her suitor's manhood. She eagerly beckoned for Troy to come closer into the grotto. Troy was about to oblige her when he was roughly shoved to the side.

Out of nowhere, a merman with shoulder-length violet hair and a dark purple tail appeared. Zale was roughly the same size as Troy. His skin, while still Caucasian, was lightly tanned. His own erection was already on full display as he again tried to push Troy away and claim Melody for himself. But Troy was ready this time and pushed Zale back. The two mermen glared at each other as they both swam into the grotto. Melody backed up against the wall as the rivals began to circle each other like sharks.

Zale was the first to charge forward. Troy intercepted him and the mermen rammed into each other. They pressed up chest-to-chest against each other while their phalluses clashed like fleshy swords. Her heart racing, Melody anxiously looked on to see who would prevail and claim her as his rightful prize.

Troy and Zale grabbed each other by the arms and began to thrash about in the water as each merman tried to force his rival down onto the grotto floor. Their tails coiled around each other like thick ropes as they fought for dominance, muscles straining beneath slick skin. The struggle sent clouds of disturbed sand swirling around them, momentarily obscuring Melody's anxious gaze.

Zale snarled and tried to bite Troy's shoulder, but Troy twisted violently, flipping them both into a curtain of glowing anemones. Their sides scraped painfully against rough coral as they tumbled, drawing sharp hisses from both combatants. Melody covered her mouth, eyes wide with horrified fascination as the two mermen grappled in a frenzy of scales and fury.

As the rivals grappled, Zale got a hand free and grabbed hold of Troy's testicles. Troy's roar echoed through the grotto as Zale squeezed. A sharp and blinding pain shot through him. He retaliated by ramming a fist into Zale's stomach. Air exploded from Zale's lungs in a burst of bubbles. Their tails whipped furiously, stirring silt into murky clouds.

The mermen broke apart for a slight breather. Then Troy stuck out his manhood at Zale, a clear challenge. Zale returned the gesture, pointing his own erection directly at his enemy. The rivals began fencing with their long hard cocks. Melody bit her lower lip and softly rubbed the area where her two halves met.

Zale landed the first blow when his penis briefly pinned Troy's down for a second. Troy responded by stabbing his erection into Zale's balls. The rivals hissed as they continued their cockfight. Their penises clashed against each other again and again, making wet slapping sounds as they fought to dominate each other.

Finally, the two shafts collided tip-to-tip. Know this would decide the victor, Troy and Zale grit their teeth and increased the pressure. Each was determined to destroy his rival's manhood with his own, sending a message to any other potential challengers. Their muscles strained as the tips of their penises mashed together. Then Troy felt his rival's shaft begin to give way. With a final surge of strength, Troy pushed forward, forcing Zale's penis to bend backwards against his stomach. Zale cried out in pain and defeat as his erection wilted.

Troy kept a careful watch as he let Zale swim off to lick his wounds. He then turned back to Melody, who greeted him with open arms and a gentle smile. Troy embraced Melody and leaned in for a kiss, which she reciprocated. As their lips met, Melody encouraged Troy to fondle her breasts. She, in turn, gently stroked Troy's penis just enough to keep it fully erect.

As their tongues intertwined and their tails gently rubbed against each other, the scales below Melody's navel receded just enough to reveal a pink slit. Troy instinctively pressed his erection against it. The tip slid along her folds, leaving shimmering streaks of pre-cum. Melody gasped into his mouth, her fingers digging into his shoulders as her hips arched forward, inviting penetration.

With a powerful thrust of his tail, Troy pushed forward. His swollen cockhead breached her tight entrance. Melody cried out—half pain, half ecstasy—as he stretched her virgin passage inch by inch. Her breasts quivered against his chest as he buried himself fully inside her wet heat. The water around them seemed to pulse with their joined rhythm.

Her inner walls clenched around him like velvet fists as he began to move. Slow at first, savoring each drag of his shaft against her sensitive folds. Then faster, driven by primal need. Melody's blue tail thrashing wildly as she matched his tempo. Their moans mingled in cloudy bubbles that rose toward the grotto's ceiling.

The merfolk couple shared another deep, passionate kiss. They slowly rotated as they continued making love floating in seawater. Troy gripped Melody's waist tightly as she wrapped her arms around his neck. Her tail thrashed wildly with each thrust. His erection slid in and out of her wet slit at a frantic pace. Melody screamed out as Troy began thrusting harder and faster. Her embrace tightened as she climaxed, inner muscles milking his shaft. Troy roared, burying himself deep as his own orgasm hit—hot seed pulsing into her in thick, urgent spurts that warmed her core. Their mingled cries echoed off the grotto walls.

Both completely spent, Troy and Melody drifted down to the grotto floor and collapsed. Between the fight and the sex, Troy took a bit longer to recover. In the meantime, Melody retrieved her rainbow seashell top and put it back on. Troy finally regained enough energy to get himself off the floor. He swam over to Melody and gently kissed her forehead. She smiled warmly at him.

Melody briefly went back home to collect her belongings and bid her father, mothers, and siblings farewell. As her elder sisters did before her, Melody left with Troy to become his first wife. Troy led Melody to his cave and showed her around. She admired the cave's spaciousness and natural glowstone lighting. Troy then showed Melody a side chamber he had prepared for sleeping. He had lined it with soft moss and kelp bedding. Melody smiled at Troy's thoughtfulness and kissed him on the cheek.

So began Troy and Melody's life together. It was not always an easy one. Troy took on two more wives over the years, and the second tried to usurp Melody's position as the main wife. That fight was almost as hard as Troy's struggle with Zale. But Melody prevailed and asserted herself in the end.

Troy fathered several children with all three of his wives and they all raised their offspring together. Then one day, Troy and Melody's eldest daughter felt the urge to swim out to a secluded area and croon out a soft siren song. Listening from home, the couple shared a gentle smile, knowing the merfolk mating cycle had begun anew.