The Assassin's Target

A girl born in an unloving family that doesn't care for each other but only themselves. She grew with that experience and one day risen upon her family and became an assassin.
Her family was a cold blooded bunch, they weren't really family at all. The girl disguised herself and hid her name, Miku Kamina to Mei Akagitsune. Anything she would be assigned, it didn't matter if it was a child or a parent, she would assassinate them cold blooded.
Until that day, a boy was framed of murder to his little sister and his step parents by his cold hearted brother, Keita Hisashi. The boy, Kiyoto Hisashi was condemned to 150 years in prison at the age of seven. He sworn to get revenge on his brother for what he did. Seven in a half years after, Kiyoto managed to escape from prison with the help of these two blades that were sealed in him the moment he was born. He barely managed to escape but made it. He passed out in the middle of the street only to be found by Mei and Takuro. They managed to save him. Mei fell in love with Kiyoto that she had someone she told her deepest secrets to. Shockingly Keita was Mei's second boss, he assigned her to kill Kiyoto Hisashi. Mei had to choose either her hatred of her family or the love of her life.