ABYSS AZURE NO ZAININ

Abyss Azure no Zainin summary:

For many centuries, merfolk have lived in the depths of the ocean—4,000 meters below the surface—where humanity cannot find them.
However, one mermaid's life is turned upside-down when her best friend falls for a human.

For many centuries, merfolk have lived in the depths of the ocean—4,000 meters below the surface—where humanity cannot find them. However, one mermaid's life is turned upside-down when her best friend falls for a human.