A Villain to Kill the Main Characters

In this world, there were those who were called main characters and those who were called non-playable characters. Those who were called main characters have special access to a level-up system that the non-playable characters cannot access. They used the level-up system to increase their power and leave the non-playable characters behind. The main characters who were much stronger than the non-playable characters looked down on them. They don't even consider them as living beings and treat them with bad manners. Not infrequently, there are also incidents of murder and robbery committed by the main characters against the non-playable characters. Even though the main characters often commit crimes, they are not arrested at all since they are considered very important assets for the world. Thus, the balance between the main characters and non-playable characters is very unbalanced to the point where the non-playable characters choose to submit to the main characters. Amid that condition, there was still one non-playable character who did not want to give up and submit to the main characters. He is Rigid, a non-playable character who wants to find a way for the non-playable characters to fight back against the main characters. However, everything did not go smoothly for him. His parents were killed by the main characters, his house was burned down, and his lover turned away from him to one of the main characters who killed his parents. He fell into despair and ended up in a bar, thinking of having a glass of wine to wash away his sadness. "I'll give you one of these two glasses of wine for free," A female bartender approached Rigid while carrying a tray with two glasses of wine. "The red one will grant you incomparable strength with the consequence that you will slowly lose your memory, while the blue one will give you incomparable intelligence with the consequence that you will lose your sanity." Ignoring what the female bartender said, Rigid drank both glasses of wine and fainted. The next day, he woke up with a system screen right in front of him. [Congratulations, you gain access to the system and all restrictions have been lifted] With access to the system and the spirit of revenge that burns in his heart, he plans to kill every main character who had killed his parents. Can he get his revenge? Or will he be killed in the end? Follow his journey by reading this book! Disclaimer: This book is a work of fiction and the characters, events, and situations portrayed in it are purely imaginary. Any resemblance to real people, places, or events is entirely coincidental. The author has taken creative liberties in the portrayal of the story and does not endorse or condone any actions or beliefs depicted in this book. The views expressed in this book are solely those of the fictional characters and do not represent the views of the author. This book is intended for entertainment purposes only and should not be taken as factual or instructional. Reader discretion is advised as this book contains mature themes, language, or graphic content.