I Thought I Tamed The Villain

After a close call with death, Iris has a sudden revelation: she's been living inside a novel from her past life. But if her memory's correct, all the characters in the novel, herself included, ultimately meet their demise at the hands of the villain, Theo. Determined to survive, Iris resolves to befriend Theo in hopes of reforming him while he's still young. At first, everything seems to go according to plan... But when she reunites with him ten years later, she realizes something's gone terribly wrong. Why is the same ruthless villain she saw in the novel... standing before her?