My Yandere Younger Brother Was Abandoned by Me After I Became a Medical Boss

An independent, gentle, beautiful and talented painting girl VS a boy who is obedient on the outside and crazy on the inside but destroys the world. Jiang Muxue was abandoned by her mother since she was a child and lived with her father until her father died of illness in the second year of junior high school. Jiang Muxue became autistic and dropped out of school to stay home. I usually pass the time by reading novels. I accidentally opened a book called "The Evil Girl Takes the Rules", and found that the female partner in the book had the same name as myself. As soon as I turned a few pages, I wore the book and happened to wear the female partner. System: This mission is to save the second male lead and prevent him from going dark. Jiang Muxue:? How could the second male lead, Lin Yezhou, heir to the Lin Group, the only son of a wealthy family, and a future biomedicine tycoon, turn evil? Oh, it turns out to be the heroine's tool man, oh, it turns out to be a hidden villain, um, he wants to destroy the world in the end? Why? Jiang Muxue looked at the young man in front of her who followed her all day long and called her sister obediently. It was impossible. There must be a mistake in the system. Until, three years later, when Jiang Muxue completed her mission and was about to go back, her obedient brother went crazy. Sister, you promised me that you would never leave me. Are you lying to me? Sister, this is the cage I built with my own hands. Do you like it? I will lock you up so that you will never leave me again. Jiang Muxue looked at the yandere talking to herself in front of her, "Impossible, I must have opened it the wrong way."