When a Background Character Model Becomes a Human Observer

“Matsuda Hejing” was an utterly unremarkable background character model, often moved around to various places to serve as cannon fodder. But as the fact that “Matsuda Hejing” appears here suggests, this background character somehow developed a sense of self and even gave himself a name. At first, everything was normal. No one noticed that this ordinary-looking background character kept showing up under different names and identities. Then, recently, things started going wrong. The games he appeared in seemed to be breaking free of memetic contamination, and his generic face had become unforgettable. He was even given some strange identities. For no apparent reason, he became the mastermind behind a conspiracy in the jujutsu world, plotting to overthrow Neon. And that wasn't all. In the blink of an eye, he became an old acquaintance of Kaitou Kid, with the secret of Pandora in his hands. Then he became an ordinary immortal in the Taisho era, hunted by the Demon King. After that, he became the mysterious person who saved his best friend made of black sludge and remained young even years later. Matsuda Hejing: I'm just a bit player, right? What is this behind-the-scenes boss setup?! Just as he was being driven frantic by one mishap after another, everything fell apart. The games turned into games “without a protagonist.” Matsuda Hejing: ??? The blurb only mentions a few of the main games. Other worlds will appear along the way, including lesser-known anime like Black Lagoon and Michiko & Hatchin. The romance is a ship-betting game. I'm trying this kind of story for the first time at a friend's request, so please let me know if there's a problem. Theme: See through the false, and don't linger in illusions