Mermaid Saga vol.1

It is said that eating mermaid flesh becomes immortal. In fact, it seems that there is the risk of obtaining horrible deformations or even finding themselves transformed into bloodthirsty monsters. But even if someone gets eternal life, are we sure that such deviation from the laws of nature represents a blessing and not, rather, a terrible condemnation? The young Yuta, who became immortal despite him, is willing to recover his humanity. One day, after a long time, he came across Mana, a mysterious girl who seems to be the key to finally achieving her goal. . .