Transmigrated into a Sweet Romance as a Female Supporting Character [Quick Transmigration]

Every world in a book is made up of all sorts of characters: male and female leads, along with supporting characters. If some people are fighting to become important characters, then someone has to be an insignificant extra who never gets the spotlight. For example, Wei Zhen. As far back as she could remember, Wei Zhen had been a passerby in novels. She was the least memorable student in the female lead's class, the junior who secretly had a crush on the male lead, a supporting character's distant relative, someone whose name people couldn't even remember. As insignificant as grass and trees by the roadside. She lived an ordinary life utterly unlike the protagonists'. If anyone ever commented on her in the book, it would surely be, "Who is this extra? I don't remember her." But Wei Zhen loved her life. Even if she wasn't the protagonist of the world, she still had her own joys and sorrows. She was the protagonist of her own life. World 1 A classmate of the female lead who secretly envies her sweet romance but doesn't even have the courage to confess to the person she likes. In the end, she lives an ordinary nine-to-five life. (The male lead does not appear in the first story.) World 2 An outer-sect disciple in a cultivation world, doing the most menial chores. She passes by the lovely life of the universally adored female lead and cultivates to immortality through her own efforts. (The male lead is a companion beast. He does not take human form by the end.) World 3 A simple-minded girl in a period novel. After coming to her senses, she decides to make a living growing cotton. She is the daughter of the female lead's late godmother, and eventually shares a steady, happy life with the person she loves. World 4 An NPC in an infinite world. Her job is to wander the streets at midnight. Then she takes in a living human puppet, the male lead. They hate and fight each other from beginning to end, yet can't escape one another. In the end, they join hands through companionship. World 5 Bonus chapter: The male and female leads struggle to survive in a wilderness world, then win the ultimate prize and live happily ever after. (Readers with a subscription rate of 70% can read this directly.) Important content warnings: 1. This is a story about a passerby who eventually becomes the protagonist. The female lead grows stronger over time. 2. The female lead does interact with the original novel's male and female leads, but she will not interfere with their relationship. 3. The plot in every world takes precedence over romance. Not recommended if you're looking for a purely romantic story. 4. [70% advance reading] If anything makes you uncomfortable while reading, please stop right away. Theme: You know, there are no supporting characters in the world.