I Am a Mermaid Princess in the End of the World

As a mermaid princess, what should you do if you want to survive the turbulent apocalypse? As a descendant of the Gods, what conspiracy is hidden in the void? Who was behind the mysterious death in the previous life? What are the reasons for those truths that are tried so hard to hide? What impact has ancient biotechnology brought to modern times? As a result, corpses littered the fields, and humanity was on the verge of extinction. Does the destruction of one civilization necessarily lead to the birth of another civilization? (The secret test is to fill in the pit again ~ Did you agree not to give up the pit?)