Becoming Male lead in the Romance Novel

As usual, after a busy workday, I went home. After opening the apartment door, I heard noises coming from the bedroom. I grabbed the baseball bat I keep near the shoe rack for burglars and went to the bedroom. I slowly opened the door. I saw my boyfriend of three years, Karl, lying naked on the bed with a woman on top of him. In a fit of rage, I went to them, grabbed the girl's hair, and pushed her out of bed. The girl grabbed her clothes, got dressed, and ran out of the house. --"Nora, you're back so quickly! I thought you were at work!"-- As soon as he said that, I slapped him. --"Nora, I can explain, it's not what it looks like. I drank too much, I wasn't in my right mind, and she seduced me. It wasn't intentional!"-- While Karl was talking, I started hitting him with the bat. --"Drunk? You don't even smell of alcohol! What are you talking about you are not drunk?! And even if you were drunk, what difference would it make? If you do this drunk, you can do it sober. It has nothing to do with alcohol. Get out of this house immediately, or I'll call the police!"--- After saying that, Karl quickly got dressed and left the house. After he left, I cried for 2 or 3 hours, then I couldn't bear the loneliness anymore and called my friends to arrange a meeting. We went to our favorite bar and started drinking. One bottle, then two, and by the fourth, my vision went blurry. When I opened my eyes, I found myself in a luxurious room decorated in a style that made me think that I was in a museum, like the houses of nobles in historical dramas and movies. The bed I was lying on was covered with high-quality fabrics with silver plating underneath; it was the softest and most comfortable bed I had ever seen. In instant shock, I got up and looked at myself in a mirror in the corner of the room. I was so surprised I almost fainted. In the mirror, a man with soft, beautifully cut black hair, pearly white and smooth skin, dark purple, slightly slanted eyes, and a perfect body that you couldn't even see on the internet or television, was looking back at me. He was tall, not very muscular, but muscular, somewhere between handsome and good-looking. I started touching my face; it couldn't be real. I was a woman, not a man and I was in the body of the male protagonist from my favorite novel. My favorite novel was titled "My Life Changed After I Became a Noble." The story revolves around the main character, Elina, living in a village with her ill mother. Her mother's illness suddenly worsens, and just before taking her last breath, she tells Elina that her father is the Duke of Lewis, one of the greatest dukes in the empire. After hearing this Elina goes to the dukedom immediately after her mother's funeral. The novel describes Elina's life as a noble after finding her father. It's a historical, fantasy, dark, and harem-themed book. The novel takes place in the Emarentina Empire, one of the most powerful empires. The Emperor and the imperial family are known for being born with extraordinary powers, unseen in the world. Each member of the imperial family is blessed by the gods, possessing extraordinary powers and abilities. Those of imperial blood are invincible, immune to poison, their bodies so strong they are invulnerable to injury and cut, and they live a long-life is a characteristic of imperial blood. The novel features five great duchies: Osborne, known for its sacred powers (the Pope also comes from this duchy); Russell, renowned for its academic knowledge, home to the most intelligent people in the empire, closest to the Emperor, and generally high-ranking academics; Scott, a merchant duchy possessing the largest businesses and shops in the empire; Lewis, famous for its swordsmen and sword masters , who are at the forefront of battles and make significant contributions to the empire, seen as heroes by the people; and last one is Alward, known for its sorcers . The eldest son of this duchy is the master of the Magic Tower, one of the geniuses who appear once every hundred years. All the male main characters come from these duchies even the Crown Prince is in the harem of a main character. But Elina chooses neither of them and ends up with Christopher, her stepbrother and the eldest son of the Duchy of Lewis. After spending time together in the dukedom, they develop feelings for each other, but there's a problem: the main male characters are excessively obsessive. To keep Elina away from everyone who is obsessed with her, Christopher imprisons her in the dukedom. Seeing this, the other main male characters can't accept it and starts a war for Elina and after killing the Christopher. Unable to bear Christopher's death, Elina goes mad from her love and commits suicide, and dies. And I am reborn as that Christopher. I sat down on the chair in the room to think about these things. As soon as I started thinking, Christopher's memories flooded my mind. According to Christopher, Elina hasn't reached the dukedom yet , which means I can change the novel!!