What Are Common Psychological Backstories For Yandere Leads In Light Novels?

After I transmigrate into a Gary Stu novel as the evil male supporting lead, a system appears in my mind. It tells me that as long as I can conquer one of the female leads, I will be able to return to my original world with a healthy body. But I've failed in my conquest. There are a few female leads in this novel. There's the fake heiress, Leslie Jackman, who I have grown up with and have viewed as my older sister. The true heiress, Miranda Suller, is a boxer who happens to be seatmates with me during our high school times. My childhood sweetheart, Catherine Langdon, who's also a genius surgeon, happens to be one of the female leads too. Heck, even my own daughter, Natalie Jackman… my own flesh and blood… All of them are quick to fall for Gabriel Linner, the poor yet strong-willed young man who's also known as the Gary Stu of this novel. Because of that, they hate me deeply. The system sighs before telling me that as long as I can die in the hands of any of the female leads, it will let me return to my original world. Later on, I use all of the tricks up my sleeve and succeed in getting killed by the female leads. But why is it that they've lost their minds after I die?

After transmigrating into a novel, I realized the heroine and I had the exact same name. Naturally, I thought I had transmigrated into the female lead. So I marched straight to the man who was still a broke nobody at the time, threw all caution to the wind, and pounced on him like I had plot armor protecting me. He even glared at me with red eyes and told me he hated me. I honestly thought he was just into the whole push-and-pull thing. Everything shattered when the real heroine showed up and I finally understood one thing. He actually hated me. Heartbroken, I packed my bags and got ready to disappear. The next second, he pinned me against the wall. "Where are you going? Already bored of me, sweetheart?"

Anomalies were descending on the world when I got thrown into a horror dungeon. The problem? I was a hopeless romantic. An even bigger problem? The dungeon’s final boss turned out to be more of a lovesick idiot than I was. The moment he saw me, he practically begged to be my personal simp.. Me: Wait… we’re doing that already? The barrage of comments exploded: “Look at him. The mighty final boss is willing to be the third wheel.” “Sorry, sweetie, but our girl already has two anomalies in line. Even if he’s the boss, he still has to take a number.”

Dita's fate changed drastically after meeting a handsome, but cruel guy. She accidentally witnessed him torturing his victim in an empty house at night. And unfortunately, she was caught. Since the night after the incident, her life became unsettled when it turned out that the guy was after her. What is Dita's fate after meeting a Psychopath guy who likes to torture, not even hesitating to kill his victims. Will she be able to escape from him? Note: This is a high school teen story

I woke up inside a novel, and not even as an important character. I became a pretty background extra in a smut novel. My brother, however, was the only normal person in the entire story. His character setting was the one man the soft, delicate heroine could never win over. He was the cold, unattainable Prince Charming she could never conquer. When the heroine cried and confessed her love, he was studying. When she offered him her whole heart and body, he was busy starting a company. When she spiraled into scandals and nightlife, he was already a billionaire, calm and untouchable. I thought he would live a quiet, ascetic life forever. Until one night, I walked in on him at midnight… holding a piece of clothing I recognized all too well, murmuring a name over and over, a name so familiar that my scalp tingled.

What happens when the tormented female lead in a novel wakes up and decides to get together with the second male lead? Coincidentally enough, I'm transmigrated into the body of this tormented female lead!