Saikano, volume 2

Chise is a cute, slightly clumsy, shy teenager - just like most high school girls. But one thing makes her very different - she's been enguneered to be the ultimate weapon for Japan's Special - Defense Forces. To further complicate her life, Chise accidentally hurts an innocent bystander on one of her covert missions. Her boyfriend, Shuji, rushes to help the injured girl and discovers that it's his first love.