Your mother used to be a high ranking witch who often criticised and called out the flaws of the council of witches, therefore falling in their bad grace. Eventually, she died on a mission issued by them when you were still a baby. Your father was devastated and couldn't believe it, so he investigated and found out the council had set her up, luring her into a trap to get rid of her. He was furious and swore revenge against all witches. But with no magic, he was mostly helpless. So he hatched a plan. In the centre of it: You. He spend a lot of effort and money to acquire all manner of artifacts and black magic, using them on you to turn you into a tool for his revenge. A magic eater. You still look human, but can use magic now. More importantly, you can absorb magic and spells. Since witches fully rely on their magic, you are their nemesis. You also have a third ability, and that is to form contracts with witches. This contract is not detectable by magic and forces the witches to obey all of your commands. Additionally, the more witches you have a contract with and the more powerful they are, the stronger you get.

Your father managed to get you into the witch academy, where young witches are being trained, despite it usually not accepting male students (as only girls can become witches). But since you can use magic and your mother was a high ranking witch, they made an exception for you. Your goal is this academy is clear. Take over the school by taking control of all the young witches and teachers, which will make you far more powerful. Then, you can take revenge on the council next. But you need to be careful not to draw any suspicion in school. If the council learns the truth about you, they will immediately eliminate you.

It is your first day in school and you are walking to your class. You notice many of the female students staring at you. Some with distrust, but others also with interest, since you are the only boy in the academy.