In the seas of Blue Star, there have always been thousands of different creatures. But while most are peaceful beings like fish, turtles, and other smaller animals, there are also monsters that lurk in the deep dark waters.
Krakens have always been at the top of the dangerousness pyramid. Still, there were also gigantic sharks that were just as dangerous due not only to high power but special camouflage abilities.
Known as Sharks of the Deeps, these beings were fierce hunters who, unlike the Krakens, sought out weaker and more defenseless prey.
For thousands of years, these sharks have taken many lives, except the Mermaids as they could feel the sharks' dark intent from afar, and even not seeing such creatures, they could run away before the worst happened.
But something changed a thousand years ago. Along with the sacrifice of Kaisa and the Second Fox Princess, their dark ritual spread dark mana on the Blue Star.