Fake Witch Claimed by Two Heirs

She got into the most elite magic academy in the world without any magic. The other students are vampires, werewolves, dragon clan and witches, all with real power. She has street performer tricks and sleight of hand. If anyone finds out, what happens to her is worse than death. Her sister died at this academy. The school recorded it as an accident. She came because the person who killed her sister is still on the grounds. She kept her head down and it did not work. The blood heir, the young prince of the wolf clan, the most powerful men in the school have started closing in on her one at a time, marking her and saying it in front of everyone: "You're mine."