Once upon a time, there exist two kingdoms. One of the was the White Lily Kingdom, a kingdom known for its warmth and beauty. The White Lily Kingdom was loved by all, favored by gods, the definition of a perfect environment to live on.

On the other hand, there was the Black Lily Kingdom. The kingdom was extremely strong in terms of economic and military power. However, it was said that the prince of that kingdom was cursed by a mysterious dark magic. A curse that was said to bring misfortune to others. His mother, the queen, died right after giving birth to him. So the king decided that the prince would be raised sheltered, for his own sake.

The prince's name was Kuro. And this day was the prince's eighteenth birthday.

Wearing his usual dark clothes made of fine fabrics, Kuro skimmed through his private library. His dark purple hair contrasted his yellow, cat-like eyes. The light was dim, but due to his curse, Kuro's eyes were used to reading on dim light.

Despite growing up alone, locked in his mansion, far from other people, Kuro was an intelligent man. He also had an extremely strong magic power, but it was too strong for him to control so he rarely used it.

"'Study of Practical Magic'... ah, here it is," Kuro hummed, pulling the book he was searching for from the bookshelf. When suddenly—

A thud sound was heard outside of the library.

Kuro was immediately alerted. There was someone here. A stranger. Someone who was not supposed to be here.

Kuro carefully approached the door. He prepared himself in case it was another assassin. Although, what greeted him after opening the library door was unexpected...