Ningyo Himeden

A dark ocean tale follows three mermaid sisters—Tara, Julie, and Ai—who entice sailors to their underwater palace with promises of pleasure before consuming them. Seeking revenge for past human violence against their mother, the sisters plot their retaliation. However, Julie's growing affection for a human named Suekichi complicates their mission, placing the pair at the heart of a conflict between their kind and humans. As tensions rise, Julie must navigate her feelings for Suekichi while the Dragon of the Deep manipulates events from the shadows, threatening to alter the course of their plans.