Nightschool is the story of Alex, a 13-year-old weirn, a special type of witch. Alex has been homeschooled for years by her older sister Sarah. Sarah also works at the Nightschool, which provides classes for night beings such as vampires, weirns, demons, and shapeshifters, once the human schools close for the night. Alex refuses to go to the Nightschool at first...but when Sarah disappears, Alex can't help but feel that someone...or something...at the school is responsible. She enrolls as a student to uncover the mystery behind her sister's disappearance.
Meanwhile, dark magical forces are gathering, and a group of young Hunters...humans whose job it is to hunt and kill dangerous night beings...are looking for Alex. Unbeknownst to the weirn, deep inside her she possesses a deadly talent, one that could get many people killed. And the only way to make sure this never happens...is to kill Alex herself.
This was a really great set of manga. The fourth volume is released in October, so I still don't know how it ends, and I can't wait to find out. The mystery of what has happened to Alex's sister gets deeper and more complex with each volume. The first volume focused mainly on introducing the characters and didn't give a lot of depth to the world they inhabited. Luckily, the second, and to some extent the third, focused more on examining this.