Synopsis: A Sinner of the Deep Sea

This captivating tale is an epic fantasy that explores the forbidden romance between mermaids and humans. Most of our planet's surface is covered by oceans, but the vast majority of humanity knows nothing about the world that lies within them. Deep beneath the waves, there exists a country that is several thousand meters below the surface. Joe is a mermaid who lives peacefully in this world until her best friend Ryuu breaks the law and is imprisoned. The particular law that Ryuu broke concerns the prohibition of revealing mermaids' existence to humans. Determined to save her friend, Joe embarks on a journey full of love and adventure. Along the way, she encounters a mysterious human who is somehow involved in the tabooed inter-species relationship. Join Joe on her quest to save Ryuu and uncover the secrets of this intriguing story.