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The MC transmigrated into a novel and became an extra from the novel. The novel is a murder thriller...
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FL is an orphan who one day recalls that she's reincarnated into a book then promptly gets adopted by the bloodthirsty and ruthless Duke whose family purpose is to clean the underworld of riffraff.
#Into a Book #Adoped Sibling/s #Child MC #Serial Killer/s #has novel
: Murder, serial killer/s