Hange Zoe is not any typical mermaid: she has a big fascination with humans. Despite the many warnings she was told about them, that didn't stop her from wanting to know everything about the humans. One day, she decided to venture far out into the sea, and comes across a human unlike any she'd seen before. Hange finds herself awestruck by this human, the short but strong Levi, a famous criminal from the town he lives in, and what will happen when these two creatures meet face-to-face, despite their differences and species?

-¿Qué significo el té negro de ese día? -Fue una invitación. -¿Para qué? -Para que formes parte de mi vida.