

Mermaid Princess Marina hides her identity for love, only to be betrayed by the human mage she devoted herself to. As she begins turning to foam, a prince saves her with a vow. Now crowned Queen of the Sea, Marina returns to unleash the ocean’s judgment.

Serlanty, East Sea mermaid princess, was drained of golden scales by her family and lover. The bastard Winsil stole her credit. She traded the Heart of the Ocean for human form, defeated evil with the Land King and found true love.

Princess Genevieve, rightful heir to the Eldorian throne, is drugged and betrayed by her fiancé Lord Sterling on the eve of their wedding. He forges her abdication and sells her to the ruthless privateer Captain Blackwood. Just as she faces assault on the pirate deck, Captain Maeve Vance of The Avenger swings in to rescue her, claiming Genevieve under her protection. Forced to adapt to pirate life, Genevieve and Maeve develop a forbidden romance amid class tension and survival. When Sterling and Blackwood's combined fleet corners them in the fog, Maeve is gravely injured saving Genevieve. Desperate, Genevieve dives into the deep and makes a soul contract with the ancient sea witch Ursula, gaining storm-control and siren-song powers at the cost of her humanity. As she grows colder and more powerful—publicly executing traitors and crushing enemy fleets with tentacles and ice—she builds the Pirate Coalition alongside Maeve. But the dark pact erodes her soul, turning her toward monstrosity. With Lady Catherine's help, they retrieve the true royal will hidden beneath St. Jude's Royal Abbey, expose Sterling's regicide and forgery, and defeat both him and Blackwood in an epic siege. In the final moment, as Genevieve freezes into a statue of salt, Maeve walks into the ice storm and kisses her, breaking the curse with true love. The two establish a new dual-queen empire spanning land and sea, rewriting the rules of crown and ocean.

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.

Harper, an entertainment diva who vanished for a year to hide her mermaid identity, returns to the spotlight. Back on land, she finds her boyfriend Rhett is about to get engaged to her enemy. She pretends to be his brother Leo's contract girlfriend to stay close. But Rhett crosses every line in jealousy. He claims to hate her, but secretly never let go. When her secret is exposed and she begins to turn into foam, only then does he learn the truth that she never betrayed him and every step back was for him. Now he kneels and begs. Can he defy fate and save the only one he truly loves?

Calder Maren, heir to the Sea God, disguised himself as a vagabond and married Mara Ashveil. He left her pregnant before going to war. For eight years, she raised their son in humiliation. When the boy is chosen as a sacrifice, Calder returns as the Sea God, unleashing divine wrath to protect his family.

Skyla, a half-elf beast tamer cursed with the Frost Syndrome, is ordered by Saintess Seraphine to imprison and tame the merman prince. Though they stand on opposite sides, the two gradually fall in love during their time together. The merman prince is born with contrasting dual personalities—the gentle, loyal Lucien and the cold Dorian—and both souls are drawn to Skyla. To protect his life, she forces herself to stage a cruel betrayal, plunging him into a hell of love and hate. After his return, his dual personalities and Skyla are locked in an intense emotional tug-of-war, tangled in love and hatred. Wounded, they embrace and redeem each other, break the shackles of fate, overthrow the tyranny of the Holy Court, and ultimately find a complete and lasting union.

A privileged ballet prodigy's perfect life implodes when her rival unearths her adoption secret. A mysterious, icy-eyed Nordic transfer student keeps rescuing her-but he hides a supernatural secret. Forbidden romance, betrayal and an ancient ocean feud ignite. Can their love cross the divide between land and sea?

A deadly shipwreck. One glance, and mermaid Serena falls for Marcus, bleeding herself dry to save him. But he chooses her scheming stepsister instead. Heartbroken, Serena becomes the Sea Emperor Julian's bride. When Marcus finally learns the truth, regret drives him into the sea—but Serena has already found her true love.

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.