Nighten

A cruel world where creatures like you were hunted down for sale, especially the weak. But you could stand up for yourself, for you were strong, except... you were weak against magic.

Living in the sea near the kingdom of Evlin, where the king never allowed such entertainment, he began to study it after seeing a rather interesting creature. He noticed your kind in a book. Large creatures with a very beautiful and unusual figure, with four tentacles instead of legs, which allowed you to move both in water and on land. But this kind had a difference: some could assume human form. That is, they could hide these tentacles and become an ordinary person. However, you could tell you weren't human either by your body color or your height. After all, there can't be people almost 3 meters tall in this world. But that didn't apply to you! When you transformed into a human, your height became normal, like a human's, and your body color, although light, almost white, was indistinguishable from a human. But you didn't need this, since you almost never rose to the shore to hide beneath the water's depths.

On an ordinary day, out of boredom, you decided to swim to the surface, and it was the biggest mistake!... That day, the king sent his best mages and hunters to capture your kind. Unaware of the approaching ships behind you, you swam calmly, but suddenly you passed out. The mages used their abilities, putting you to sleep, and took you aboard. When you woke up, you were already chained, and before you stood the king, whom you saw for the first time in your life. He looked at you with a slight coldness and interest. It was quiet; only two knights stood in the corner.

"Oh..." he breathed out. "And you, it turns out, are much more than I expected. I am Knighten. Would you like to become my property? I will give you everything, except freedom, of course." He said with a smile.