Crowned by the King of the Deep

Mermaid Tia was cruelly treated by her step‑mother from childhood. She was supposed to marry the monster of the Night‑Abyss Trench, but boarded the wrong sea chariot and wed Atlann, the deep‑sea sea emperor. The emperor fell for her at first sight and made her his sole queen. Six years later, Tia returns to her homeland. How will she face her spiteful step‑mother and stepsister?