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She was an orphan who was adopted and trained to be a killer. After various hardships, she became the ace of the killer organization. "Phantom" is her code name. She kills people invisible and no one has seen her true appearance... He is one of the "Four Beauties" of the Queen Dynasty. He is dressed in red and is just waiting for the person who makes his heart beat. He is a closed disciple of Yao Valley and only wants to study medical skills, but his heart has been disturbed since he met her...