

Bound by three thousand years of tangled fate, Medusa is reborn. She is the fated maiden prophesied to bring down the Olympians — Dusha, a marine archaeologist. To save her brother, she seeks Atlantis and meets Poseidon disguised as a mortal. Little does she know, it is a deadly trap laid by the Olympians. The final battle ignites on the isle; all Olympians stand on the brink. As millennia of strife descend, will her reincarnated forbidden love with Poseidon be erased ruthlessly by divine authority, or get its long-awaited happy ending?

Alex was the son of Poseidon, the God of the Sea, and the recognized King of the entire coastal continent. To protect the woman he loved, he deliberately concealed his royal identity and disguised himself as an ordinary farmer, quietly spending five years of resources helping the down-and-out Amy family rise into the nobility. Amy, however, only had eyes for power and status. She despised the farmer-like Alex from the bottom of her heart. At a noble banquet, together with her mother Monica and her admirer Blake, she publicly humiliated and expelled Alex, tearing up their engagement with her own hands and trampling on the castle deed and the treasured Heart of the Ocean he had given her. On the way, Queen Helena of the Odin Empire was besieged by werewolves. Alex stepped in to save her and gifted her the Sea Hunter's Blade, a weapon capable of suppressing werewolves. Helena fell for him at first sight and offered to marry him with her entire empire as dowry, but Alex politely declined, still devoted to Amy. When a large pack of werewolves attacked the Odin castle, the Sea Blade unleashed its divine power and drove back the wolves. Upon learning that Alex had gone to Amy's banquet, Helena immediately set off for Moore Castle. At the banquet, Amy and her companions continued to belittle and expel Alex, even ordering silver-armored knights to strip him of his royal cloak and the Trident of Poseidon. The instant the knights moved to act, Alex stopped hiding, revealing his kingly regalia, his identity on the verge of being exposed. Helena arrived just in time and publicly declared Alex to be the future sovereign of the Odin Empire. All the nobles present—Amy, Monica, Blake—were plunged into extreme shock and utter collapse.

Newly appointed Sea God Arthur returns to the Merfolk Kingdom that abandoned him eighteen years ago to bless its new king and find his birth parents. After rescuing Princess Elena from a sea monster, he learns that tailless mermen are believed to bring disaster. Queen Seraphina recognizes him as her son but cannot acknowledge him. When Marcos launches an arena battle for the throne, Elena is gravely wounded. Seraphina's tears form a mermaid tear crystal, revealing Arthur's true parentage. To save his mother, Arthur can no longer hide his power.

After being blacklisted for reporting sexual harassment, former marine researcher Olivia becomes an aquarium cleaner. A mysterious pearl gives her the power to hear sea creatures' thoughts, revealing that beastmen are secretly imprisoned inside the aquarium. She joins shark prince Caspian, orca prince Keal, and dolphin prince Dorian in investigating missing beastmen. As all three princes fall for her, they uncover a research group creating artificial sirens to control male beastmen. Olivia's hidden Moon Goddess bloodline may be the only key to saving them all.

Siren Princess Mia is sold into the black market by her first love and forcibly bought out by Alpha Ethan, who binds her with a contract. From resistance to surrender, the two join forces to crush her hypocritical ex. To save the sea clan and defy the curse of the oracle, Mia awakens as the Siren Queen while Ethan rebels against fate itself. From a contract marriage to soul-deep resonance, they rise together against the darkness, sealed by a vow: the deep sea as the pledge, a lifetime as the promise.

In her previous life, Serena, the Golden-Tailed Princess of Atlantis, was betrayed and murdered by her adopted sister, Lina, and her fiancé, Kaelen. Reborn with the memories of her past, she sees through their schemes and, to escape her doomed fate, ventures into the Abyss, where she bonds with the ancient Sea God Nereus, who has long been sealed away. Their union leaves her carrying nine divine eggs. At the Birthing Ceremony, Serena exposes the villains' conspiracy and joins forces with Nereus to defeat them. Together, they abolish the merfolk tail-caste system, and Serena ascends as the Sea Queen, ruling the deep sea alongside the Sea God.

Beneath the ten-thousand-meter deep sea, theFour Kings of the Sea Realmsrule over a barrier-enclosed ocean kingdom. Their queen,Isa, is in truth the only daughter ofNereon the Sea God. Four hundred years ago, she concealed her divine identity. With her sealed godly power, she rewrote the fates of the Four Kings, and forged a sacred sea oath with them: to share crown, throne, and soul. She once believed those years of living and dying side by side would outweigh any lie. That was untilViola, the Saint of Tides, returned after a hundred years of claimed disappearance. She gained the kings' trust with a stolen Saint Conch Seal, then used cursed wounds and forged evidence fabricated byVale the Sorcererto accuse Isa of attempting to murder her. The Four Kings chose to trust a single silk scarf stained with residual curse, over the lover who had stood by them for four centuries. They publicly demanded theCrystal Tearbound to Isa's heart, bestowed all her treasures upon Viola, and finally stripped her of her title as Sea Queen. Gravely wounded, she was cast into an abyssal deep-pressure cell. Meanwhile, in a hidden apothecary unseen by all, Viola was using the stolen Crystal Tear to heal her true lover, Vale. Everyone pressed Isa to bow in submission. Only her royal guardNornstood by her unfailingly. After begging the Four Kings in vain for a cure, he had no choice but to accept Vale's terms: to venture deep into theTrench of the Fallenand retrieve the Bone Key of the Sinking Tide, in exchange for a single vial of Tide-Restoring Elixir. While retrieving the key, Norn was besieged by sea serpents and mortally poisoned. Yet he dragged himself back to the kingdom, tested the elixir on himself first, then pressed it gently to Isa's lips. He never knew Vale had never intended to cure his poison, nor to save Isa at all. The moment the elixir touched her lips, the brief relief gave way to a horrifictransformation: Isa grew black-silver scales, a long sea serpent tail, and sharp c