The Retired Hero is an Extra - Chapter 1 - : Prologue: Good Riddance

In this school fantasy story set in the distant future, creatures contaminated by pollution have overtaken the land, forcing humanity to live in isolated mobile cities called Regios. One such city named Zuellni is a self-contained school in which freshman Layfon Alseif has just enrolled. Layfon reluctantly joins the 17th Military Arts Platoon led by the third-year student Nina Antalk and embarks on a series of adventures.

Gu Mingxi and Pang Qian were next-door neighbors, classmates, and deskmates. From year-to-year, even when the class seating was rearranged, they would still be deskmates. They grew up together like a pair of brother and sisters despite having different parents; if it was someone else, then their parents would probably have already arranged their wedding. However, Gu Mingxi was different.

Zhou Wenwen, who had traveled to a parallel world because of sudden death, thought that he could only live in such an ordinary life in this life, but the golden finger finally opened. He has a store where he can buy technological items and magic equipment to ensure his survival.

But the threat that followed made him realize that this place is not ordinary, because there are Transformers, Marvel, the Dark Portal from World of Warcraft, etc.

- Description from novelbuddy

As the Martial Arts Emperor, live-streaming superstar, and kung fu megastar, Wu Li says: 'Sanda, boxing, judo, Muay Thai, Jeet Kune Do, karate...whatever you practice, in the martial arts there are just two words: one horizontal, one vertical; if you do it right, you stand; if you do it wrong, you lie down.'......When Wu Li gains a martial arts system and discovers that live-streaming is the way to get stronger,【The number of live-stream viewers breaks through a hundred thousand, gaining a hundred thousand fan points】【Spend fan points to upgrade Baji Fist to master level】【Spend fan points to exchange for the passive skill 'Muscle Man'】......Wu Li: 'When the whole world is watching my live stream, I am the strongest man in the world!'