What Happens In 'What Is Existentialism?' Spoilers

A lost soul summoned to relive the body of a dying woman finds herself in a quest of unraveling the secrets of her true identity. But what if she finds out that she is only existent in someone else's mind? Retrace the path you've taken. Don't let your mind betray you. Decipher the mystery. This is the life after death story of Lenore.

When my fiance's student argued with me, she knocked over a gas cylinder and caused an explosion. As the fire spread, my fiancé rushed into the lab wearing a gas mask. However, his priority was to carry his student to safety. As he left, he said, "Wait for the rescue team! A teacher should treat their students like how a parent treats their children. If something happens to Amanda, you don't deserve to be a teacher!" In the end, I inhaled too much toxic gas and died, never having waited long enough for the rescue team to arrive. Since I was the only one who had mastered the core data of the lab, no one could take my place. This meant that five years of hard work in the lab were destroyed, and Astran University was kicked out of a global research project. Later, William, the once esteemed professor of Astran University, became a pariah—someone whom everyone scorned and reviled.

Aurora’s perfect three-year relationship ends the moment she catches her boyfriend with another girl. Heartbroken and humiliated, she goes to a bar to drown the pain… and wakes up after a reckless one-night stand with a stranger. The problem? He’s her new professor. Now every lecture feels like a dangerous secret, every glance heavier than it should be, and forgetting that night becomes impossible. But in a world where lines shouldn’t be crossed, how long can they pretend nothing happened… when everything already did?

On the day of the SAT exam, my girlfriend, Heidi Moore, makes the entire class stay with her and wait for her childhood friend, Jeffrey Price, who's running late. But it's less than an hour before the exam starts. If they keep waiting for Jeffrey, they will definitely miss the exam. In my previous lifetime, I played my part as the class president by advising everyone to take the exam first. But all I received was their scolding. "You're just jealous that Jeffrey and Heidi are extremely close friends! That's why you want to ditch Jeffrey so that he can miss the exam, huh?" I could only stand in the pouring rain while begging my classmates relentlessly. Only then did everyone leave for the exam venue reluctantly. In the end, we were able to arrive at the exam venue one minute before the exam started. But after the exam was over, I was pushed off a building by Jeffrey, which caused my death. However, Heidi and the rest of my classmates gave the police their fake testimonies. "Finley caused Jeffrey to miss the exam. That's why he killed himself out of guilt!" Jeffrey even used the opportunity to sell his sob story and become a popular influencer. Mom tried to seek justice for me, only to get cyberbullied by the Internet users, who were blind to the truth. Dazed and disoriented, she drove off a cliff, and her body was nowhere to be found since then. Only after I died did I realize that this was just a part of Jeffrey's scheme. When I open my eyes again, I've returned to the day Heidi tells the entire class to wait for Jeffrey before departing to the exam venue together. In this lifetime, I won't stop my ungrateful classmates from ruining their own lives.

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?

I used to be the apple of my family's eye, but Suzanne Nilson changed that when she showed up on my birthday with a DNA test result. The Nilson family cruelly kicks me to the curb and throws me back to my biological parents, leading to me being sold off to the village idiot. Xavier Gubbens, with whom I've grown up, kicks the door down and saves me. Later, he etches a word on my face. "Do you think you're done repenting for your sins with this, Suzanne Nilson?" Later still, his eyes are red as he pleads, "Can't we go back to how things used to be?" How things used to be? There's no such thing. Everyone has to look to the future.