Mizutama, a half-mermaid who lives among humans, was dragged into the water by the mermaid and exchanged her body because of her father's betrayal of the mermaid. After Mizutama, who became a mermaid, returned to land, she was surprised to find that her father had died unexpectedly. Her friends no longer recognized her and even hated her. She also lost her voice and met the boy she had secretly loved for seven years... The mermaid wanted her body back after revenge. The city's superhumans wanted to kill her because she seduced humans.
One conspiracy after another, the loved ones are far away one after another. Although I get the love of my beloved, I can't be with him. Is this a love that is caused by a strange combination of circumstances? Can she change her body again, or will she be a mermaid forever?