Who am I? A time traveler, or a soul trapped in this body?
Lysander woke up on a fish-man island under the deep sea and found himself stuffed into a mermaid body full of mysteries. Memories rushed in like breaking waves - the despair of the first generation Poseidon, Joyboy's oath, the reverberations of ancient wars... These pasts that did not belong to him were engraved into his soul like a brand.
From the revolution on Fish-Man Island to the strife and tide of the new world, Lysander finally approaches the truth: he is not an ordinary person who accidentally traveled through time at all, but the "successor" created by the first generation Poseidon at the cost of his life. Not only does he want to lead the mermaid tribe to rise, but he also wants to expose eight hundred years of lies and fulfill Joeyboy's unfulfilled vow - to truly liberate all oppressed races and histories.
This is a continuation of the war that spans thousands of years,
It is the final wave launched by the Son of Deep Blue for the symbiosis of all things.
