To Take a Mermaid's Heart

To end the war between humans and marmacs, young half-marmac Cordelia is sent to live with the ruler of the Bavenburg Empire. There she lives a charmed life, surrounded by loving friends...or so she thought. At midnight on her 18th birthday, Cordelia's heart is stolen as she's murdered by her beloved Emperor. But before her life fades, she's somehow sent two years into the past. With the veil lifted from her eyes, who can Cordelia trust to aid her escape from the place she once called home?

Original Webtoon:
Naver Series, Ridibooks

Official Translations:
English: Tapas, Tappytoon, LINE Webtoon
French: Lezhin, Tappytoon
Others: Japanese, S.Chinese