Complete Annihilation Vol. 1

Magic has erupted in the field of combat fighting. With every weapon summoned by a male or female mage-warrior, MW for short, comes an extraordinary burst of magic power that differs from person to person. Some powers pose only small threats and are extremely small in scale, but others have the power of a supernova explosion, which could pose threats to the danger of not only the world but also the solar system.
Every MW comes with a title. Their family title is either passed down from parent to child generation after generation as children take up their parents' occupations, while others emerge from the things a child does to earn the that certain title from the people of the world.
But now, in the 21st century, a new threat has risen. Two young, mere teenage girls, have become the world's most wanted criminals. One is known as "The Death Angel," a beautiful black-winged angel and the other is "The Annihilator," a devilish and slightly insane girl. Neither girl has been seen by a living soul, and the pair of assassins have never been caught once. Not even their real names are known in the world.
Though no one knows it, these two assassins have a strict policy of not killing innocent people. Every person to die by their hands has committed a wrongdoing or crime in their life, whether or not it was unveiled by the public. And upon learning that a powerful organization is aiming to target the most prestigious MW boarding academy in Japan, Himeji High School, both are determined to catch the perpetrators and make them pay for their sins--with their life.
However, in order to accomplish this, they first must build their trust with the society as Hoshimi Meika and Mihara Eimi by attending Himeji High School.