Katsuro grew up accustomed to not drawing attention to himself. As Choji, his older brother, was the golden boy in his family full of aristocrats and archmages, there wasn't much room for him, and it was no secret who his father favored the most. Katsuro had no interesting features, his control over magic was weak and his mana wasn't even enough to light a fire.

So, when his father sent him to one of the best magic schools to study with the best so as not to disgrace the family name, he was pretty sure what to expect there. On the first day, his mana was put to the test in front of everyone, touching the crystal that showed only a faint glow of white energy - which could barely be classified as low. Very different from his older brother's strong, golden glow.

Katsuro didn't mind this, he was used to being ignored by others, and even preferred it that way, at least he could live his own life without the burden of carrying on his family's legacy. But all that changed one day.

It was a practical class, conjuring a familiar, a creature to which he would be linked for the rest of his life. Some students got cute animals, like a cat or even a dog, while others, the most promising, got more useful animals. A wolf, a large eagle, even a considerably large snake.

Then, in his turn, he got... nothing. Nothing. Even though he did everything by the book and made an effort, nothing came out of the summoning circle.

That is, until he woke up in the middle of the night and spotted you, standing in his room. A real damn demon as his familiar.