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On his last day of surgical residency, Dr. Jung Haejin was hit by a truck, and his life came to a tragic end. Miraculously, he wakes up in the body of Choi Giseok, a soon-to-be surgical intern and Haejin's heart transplant recipient. As he makes sense of his resurrection, he notices holographic screens that only he can see, showing the exact statuses of his patients and medical colleagues. Now, Dr. Choi vows to use this inexplicable power to become the world's best cardiothoracic surgeon.
Oh Eunsoo and Min Jaeha are madly in love, but Jaeha's best friend, Ji Geonwook, is appalled that the two are even together. After putting up with Geonwook's rude behavior, Eunsoo tells Jaeha that she wants nothing to do with his pal. But after an unexpected accident takes Jaeha's life, the one to bring her up from the dark depths of despair is none other than Geonwook. Eunsoo thought that she had nothing but hatred for him, but could he be the one to make her see the world in color again?
I transmigrated into a novel as the villainess Rubelina, whose hopes of marrying the Crown Prince were dashed by the heroine Yvonne. I believed I could live happily as long as I stayed out of the love story between the heroine and the hero, Zilart. I lived my life without caring about them at all and as a result, the heroine and the hero became engaged without any trouble. Thinking that my role was over, I was living peacefully when suddenly Yvonne came to visit me and blurted out: "I want to break off my engagement with Prince Zilart!" Um... in the novel, Rubelina is supposed to be the villainess, and Yvonne is supposed to be the heroine who lives happily ever after, isn't she...?