Ten thousand years later, those who fly in the sky are called angels, those who run on the ground are called vampires, and those who swim in the water are called mermaids.
They all have the same ancestor, called humans.
In this era where alien races are everywhere, pure-blooded humans are considered an endangered species, and protection laws stipulate—
1. Do not hunt or prey on humans at will.
2. Rare humans are very fragile, please take care of them patiently and sincerely.
3. The above two items, except Gu He
Purpose: Please do not eat rare species