Love Blade.

A Woman named Rose is a virgin in her early twenties, who has a rare condition which cause her to kill every time she is sexually aroused. She tries to hide the bodies, fix herself and find out about her condition. That keeps her alone and in love with her knives. She takes up a job as a hired killer and stays single but meets another woman, named Sam, who has the same condition and has answers for her question, but does love prevail and what secrets are revealed?