The Black Book: Seven Deadly Sins - Chapter 23: Sleeping Anywhere, Any Size

In her previous life, Yvonne Taylor died with hatred. Her stepsister burned her face with sulfuric acid, and her father was brutally murdered by her stepmother. Even Zachary Leinster, her father's best friend and the man who loved her the most, died trying to save her.Yvonne is miraculously reborn and begins her revenge.When she comes back, she is no longer the playful girl everyone knew. In order to take revenge, she applies for a prestigious school, majors in business, caters for her stepmother, and even... marries Zachary Leinster, her father's business competitor and ten years her senior.

It’s said that the prince of virtue had almighty martial arts. It’s said that the prince of virtue had the most handsome appearance in the world. It’s said that the prince of virtue was brilliant. But all was legend! A fire ruined his wonderful appearance and his legs. Even the talented bride under their marriage agreement were replaced furtively. Ye Liu-li was his bad-luck substitutive princess. She went a long way to graduate from Medical University and had her internship with pain and joy. Who knew that in order to save a suicide patient, she fell off the building and crossed time into a “chessman” of prime minister. She had also been married to the disabled prince replacing her elder sister. On the wedding night, when most other couples were having their romantic night, she was thrilled. It didn’t matter. Revenge never came too late. She would never let go of any of them who entrapped her or harmed her.

- Description from Novelupdates

"When will people understand.... I'm only half insane?"