Suddenly a Monster (A Parasyte fan-fiction)

(Disclaimer: This is a fan based story, Parasyte belongs to Hitoshi Iwaaka) Young Kaoru Kusaka was an average teenage girl. Average until a 'parasite' embeds itself into her left arm and absorbs it. The parasite soon learns to speak and makes a deal with Karou, if she dies, it dies, so it will protect her from other parasites that are trying to kill her. Will her new arm be able to help her survive, or will she fall, helpless to the power of 'complete' parasites?