In the first chapter, the female protagonist broke up with several boyfriends and died. In the end, she was selected by the system because of the resentment of the female supporting characters in various parallel spaces.

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I'm not sure which Doujin novel you're looking for because I don't know if you've found the one you're looking for. However, I can recommend a Doujinshi novel called " The Prince of tennis: Shusuke Fujiwara ", which tells the love story between the heroine Charlene and Shusuke Fujiwara. This novel is very popular among the Doujin novels of the Net King and the storyline matches your description.

The female lead Su Wan used the identity of "cannon fodder ex-girlfriend" to shuttle through different time and space, obsessed with how to happily break up the male and female leads and help the male and female leads reverse their fate. There was also a plot where the male lead turned evil. I hope you like this fairy's recommendation. Muah ~😗

The following are a few recommended ancient novels where the female lead broke up in a cool manner: 1. " Pet Capture ": This novel tells the story of the female protagonist who was framed after breaking up and lost everything, but she still left the male protagonist. The male protagonist only realized his feelings for the female protagonist after she left. The story was full of twists and turns, suspense, and sweet love. 2. " The Real Daughter of the Chic Marquisdom VS Second Brother Lu ": This novel was about the marriage between the female lead and the male supporting character. Their relationship only developed after they broke off their relationship. The story also involved a love triangle. After the breakup, the female lead showed her unrestrained personality. She no longer relied on the male lead, but pursued her own happiness. These novels all had the style of the ancient language. The plot was complicated and interesting, suitable for readers who liked ancient romance.

The following are some recommended ancient novels, in which the plot of the female protagonist breaking up in anger may appear: 1. " Pet Capture ": This novel tells the story of the female protagonist who was framed after breaking up and lost everything, but she still left the male protagonist. The male protagonist only realized his feelings for the female protagonist after she left. 2. " Scheming Beauty ": The female lead was a little maid. She made the male lead fall in love with her step by step to get to the top. This novel described the story of the female protagonist, who was not true, kind, and beautiful, but scheming. 3. " Servant Seven Seven ": This ancient novel tells the story of the female protagonist's humble status and liking the male protagonist. The female lead was a roadside beggar, while the male lead was the prime minister of the Dachun Dynasty. The difference in status between the two was huge. Please note that the novels recommended above may include the plot of the female protagonist breaking up in anger, but the specific plot and ancient background may vary from novel to novel.

Sorry, my answer may not be accurate or complete. According to my knowledge of online novels, urban romance novels with the female protagonist Gu Yuebai usually don't write like this. This kind of scenario may be seen as immoral or inappropriate and difficult to accept in real life. In real life, relationships between men and women should be voluntary and should not involve sexual promises. If you have any other questions or need any other help, please let me know.

The book "Rebirth of the Supporting Female Lead" met the requirements. It was a modern romance novel written by Panda, who was easily angered. The main plot was that the female supporting character realized that she was deeply in love with the male protagonist after her rebirth, but the male protagonist had already fallen in love with the female supporting character. In order to fight for the male protagonist's love, the supporting actress decided to push the female protagonist down the mountain. The father of the female supporting character was a wealthy businessman who funded the male and female characters to go to school. I hope you like this fairy's recommendation. Muah ~😗

I don't think it'll necessarily satisfy your needs, but I'll try my best to recommend a novel that's the most relevant to your description of your needs."Wear It Quickly, Female Supporting Character Is Extremely Fierce" is a sci-fi space-time travel novel written by author Chang Si. The general plot of this novel is as follows: An Ran didn't want to slap him in the face. She loved life and only wanted to live a free life. Until one day, she met the Quick-Piercing System. From then on, she had turned the Space Palace's battle novel into a farming novel without a CP. She had turned the male channel into a school cookie. She had turned the story of carrying the wrong child into a business war story of a wealthy family. … I recommend my old novels: "The Woman Who Dressed Quickly as Su Zhatian","The Woman Who Dressed Quickly as a Counterattack on Everyday Life","I Only Wish I Don't Let You Down", and "It's Very Sweet to Have You for the Rest of My Life". ---------------------------- "The Female Lead of the Fast Dressed: The Domineering, Cool, and Dragging" was a sci-fi space-time travel novel written by the author, Wei Yangyang. The general plot of this novel was: [1v1 Sweet Pet] After System 001 bound to the host, it was a little sad because… "Attention! Attention! The target's Darkening Value has reached 100. The host's life may be in danger." In the next second. "Beep! The target has died!" The System was speechless. Why was it that the big boss that it could not handle could not survive a second in the hands of the female lead? #What if the female lead is too strong? Waiting online! Anxious!# [Female Lead: What is our slogan?] System: Cause trouble! Cause trouble! Let's hug the female protagonist's golden thigh and dominate the system to reach the peak of our lives! ---------------------------- "The Female Lead of the Quick Transference System is the Boss" was a sci-fi space-time travel novel written by the author, Fish in the Basket. The general plot of this novel was: Fan Qing had died, and somehow, he was bound to a system. [System: You have to go to a different world to play the role of the female lead, and then…Fan Qing nodded,[Understood. System: Wait, I'm not finished yet!] Wait, what are you doing! You're a delicate female lead, not a villain! Wait, host, that's the male lead. Host, put down the knife! No, the host is a villain. You can't be friends! The host is a vicious supporting actress. You can't make a deal! Then, the system watched as its host reached the peak of his life again and again. This book was also known as "My Host Is Always Darkening", and the author concluded it with "It's Not Easy to Be a Female Partner in the System." ---------------------------- "The Woman Who Quickly Transformed The System Is Cheating" was a sci-fi space-time travel novel written by the author, Jiu Jiu Ji. The general plot of this novel was: [Quick Wear] Monster: [Why did you leave me behind?] "I'm lucky to have met you. I won't let you down." "I don't care if it's right or wrong. I only want you." Everyone had different experiences and personalities. They did not care about right or wrong, they only cared about karma. ---------- 1. Female host: Wen Su. No male lead. 2. This article is headed for the female protagonist. The female protagonist herself is the golden finger. 3. Later on, there would be a separate story plane, and the female lead's presence would be very weak. 4. All plots serve the plot. Please forgive me if my logic is not rigorous. 5. He didn't expect to add it later… ---------------------------- The book "The System's Quick Transference" was a sci-fi space-time travel novel written by the author, Queen Loves Fast Transference. The general plot of this novel was: The 3,000 realms suddenly collapsed one by one, and the children of the major realms became villains. Xia Mingyue became the realm restorer and executed a quick transmigration, dealing with all kinds of flirtatious and cheap systems along the way. It was not typical to wear it quickly. When it was quickly worn, the female lead was the main character. ---------------------------- "The Host Is A Little Unlucky" was originally a sci-fi space-time travel novel written by the author, Mo Moshuo. The general plot of this novel was: She wasn't a scumbag. She just liked handsome men. Was that wrong? She was just washing her hair, and she was bound by the broken system to do a mission before she could go back. Wasn't this unlucky? During the mission, almost all the mission spaces collapsed, but no one blamed her. Wasn't that strange? Gosh, after completing so many missions, she always felt that her identity was not ordinary, which made her a little arrogant. It felt great, alright? This article is slow and may have many shortcomings, but I will work hard to improve. I hope everyone understands! ---------------------------- The book,"The Woman Who Quickly Passed Through the System Is Not Good to Be", was a sci-fi space-time travel novel written by the author, Fish in the Basket. The general plot of this novel was: [Author's new novel,"The Female Lead of the System is the Boss." Please add it to your collection ~] Yun Ran accidentally bound a system to be a female supporting character in every world, so that the female supporting character would have a perfect ending. Then, she found that she would meet that familiar passerby in every world. "System, what's wrong with him?" The System, who was playing dead at this moment, would burn paper for small matters and dig graves for big matters. Book 1v1 Do you think that a top-notch passerby is pure and innocent? No, he was a monster. ---------------------------- "Don't be presumptuous, wear it quickly" was a sci-fi space-time travel novel written by the author, Finger Ink. The general plot of this novel was: With the emergence of various fast-acting systems, the female supporting characters counterattacked one after another. Passers-by were crazily trying to make their presence known, and the female leads, who were the destined ones, could only become a springboard for the counterattackers to rise. They were pulled down from the altar and lived a miserable life. Jun Yu said,"Since there's a path to heaven that you won't take, then I'll send you to hell." The system silently said, Ding! The high energy ahead, the former death-seeking female supporting character quickly dodged. [The male and female protagonists will reach the end of each life. Do not duplicate.] ---------------------------- "Quick Wear: The Counterattack Female Supporting Character's Temptation" was a sci-fi space-time travel novel written by the author, Ban Xian Xiao Wu Xiao. The general plot of this novel was: [New book "Top Player: Female Villain's Cheat"] Different worlds, completing missions again and again. Anyone in any world was virtual data to Hua Zao, dispensable passers-by. Until she realized that in different worlds, she could always encounter familiar soul auras! Hello, have we…met before?" ---------------------------- "Quick Wear: Host, Seeking Love" was a sci-fi space-time travel novel written by the author, Like A Shadow Like A Dream. The general plot of this novel was: In order to survive, she had no choice but to enter the infinite reincarnation with her only hope. From the beginning, her abilities and memories were not completely sealed until they were completely sealed. She wondered if she could save them or if she would be trapped in this fate that she could not escape from. 0908: Host, I am your future partner. I have followed the guidance of fate and experienced many hardships before successfully coming to your side. 0625:"Host, we are the real system. I was the one who found you first. Do you believe that there is a connection between us?"

There are many different plots and styles in novels where the female protagonist transmigrated because she picked up a ring. The following is one of the possible plots: The female lead was called Li Tingting, and she was an ordinary university student. One day, she picked up a strange ring in the forest and put it on. After wearing the ring, she actually transmigrated to a strange world. This world is full of magic and martial arts. The female protagonist discovers that she has superpowers and decides to study magic and martial arts to become a powerful female expert. The heroine began her adventures in this world and met many interesting characters, including a mysterious magician, a loyal warrior, and an evil demon king. The female protagonist continued to learn and grow, and finally defeated the demon king and saved the world. In the process, the female protagonist also found her love and fell in love with a brave knight and married him. In this world, the female protagonist not only became a powerful female expert, but also had her own life and career. She used her magic and martial arts to help people solve various problems and became the guardian and leader of this world.

The information you provided is not detailed enough. I can't understand which novel you are referring to. If you can provide more context or description, I will try my best to provide you with a more accurate answer.