Ai starts going to high school after her parents finally give in to her pleading. One problem, she was deathly shy and don't do good with others, but she was determined to beat that when she goes to school.
When you turn 18, you're considered an adult, whether you feel like one or not. So, when Beatrice Prior is suddenly an 'adult' and she's left all alone, what can she do but accept the offer to follow in her parents footsteps, and maybe avenge them on the way? Not only is it a chance to leave everything she's ever known behind her, but maybe, in this new city she'll find something or someone, to fight for.