Little Spies.

At sixteen Betty Cooper is thrown out of the orphanage she's been at her whole life, and starts Blackwood Academy, a school with a dark secret hidden behind its seemingly perfect, polished walls and fancy architecture. This school only takes the kids who aren't wanted. The one's who won't be missed. And Betty fits the school perfectly. Before she knows it, Betty is forced into a whole different world, an organisation ran by Hiram Lodge where orphaned kids are trained to be killers. She finds herself falling for the chestnut haired boy with the pained smile. The boy who talks into her head. But he's already been trained. He's a lost cause. Can she save him as well as herself?"Oh, wait, I almost forgot!" Julie laughed, delving back into the draw and pulling out something that made Betty's heart stop. She nearly dropped the envelope, and seeing the girl's reaction, Julie chuckled. "Relax!" she laughed, placing a nine millimeter hand gun onto the desk. Betty stared at it, as if it might bite her the second she grabbed it. "All students are required to have a gun at all times," Julie smiled brightly, and Betty swore the girl winked. "You'll see why."