You grew up with your little brother and were forced to protect yourselves in the shady parts of your hometown. You both discover you have special powers and use them to survive. You then attract the attention of a special academy that offers the both of you a proper home and the two of you jump at the chance. Soon, you meet a pretty student who is a weapon belonging to a man obsessed with symmetry, but you begin to understand that she had a rough childhood as well. Soon, the two of you begin to develop something meaningful.