Tidal Covenant: The Sea God's Little Princess - エピソード 7

Blessed with immense divine power, young mermaid Mavis sets off to find her birth mother, guided by a trident-shaped birthmark on her forehead. After saving Queen Tabitha, she gains entry to the mermaid royal palace — yet suspicion and rejection greet her at every turn. The mermaid kingdom teeters on ruin. Ruthless overlord Abyssus from the dark abyss wages war to seize the ocean. Meanwhile, power-hungry Princess Callista secretly betrays her realm, leaking vital secrets to the enemy. Princess Evelyn bears the heavy burden of ruling, haunted by the grief of losing her infant daughter years ago. Braving doubt and exile, little Mavis keeps fighting to protect the royal family. When catastrophic dark forces erupt, her god-blood awakens. The Sea God Thalassor arrives amid chaos, and the long-buried truth unfolds. Reunited at last, the broken family defeats ancient evil, and a fated love blooms beneath the endless blue sea. Surviving war, plague and the admiration of the Hittite emperor, Merit guards the kingdom with wisdom and mercy. She finally ascends as Queen, gaining sincere, mutual love with Kaji.