Rescued by a Mermaid Princess, She Insists on Marrying Me

Three years ago, mermaid heir Luna rescued Kai, a human researcher, and the two began a forbidden love that crossed the boundary between their worlds. Luna's adopted sister Siren, overwhelmed by grief, seizes the throne and places the blame for her pain on humans. Imprisoned and struck by a deadly curse, Luna eventually finds Kai again, and together they must uncover the hidden roots of the war while facing betrayal and bitter hatred on every side.