I am Hollywood - Chapter 484 - 485: The Mascot

As the last abyssal demon in the world, Wen Long was pulled into various worlds to do tasks by a guy who claimed to be a system. The goal of her mission was to save those villains who had been blackened for various reasons…

- Description from Novelupdates

[ Vol.3 ] Lucius “Lucien” Cronus—a titan of time, innovation, and power—stands at the peak of a world he reshaped with genius time-fueled ambition. Yet every triumph is hollow, every bond an echo—because none can replace those he’s truly lost. When faint disturbances ripple through time, Lucien’s obsession reignites, pulling him toward a confrontation no invention can stop—and a fate no one can escape.[ Vol.1 ] Ren, a young clockmaker’s apprentice living in 1868 Japan, begins to experience strange visions—glimpses of people he’s never met and lives he’s never lived. When a girl from an elite family speaks words he’s only heard in dreams, Ren is pulled into a mystery that stretches beyond memory and time. As dangerous spirits appear and reality begins to shift, he must uncover the truth behind his visions before everything he knows begins to slip away.

Long Fei, a cross-timer and doujin, is an otaku who traveled to another world. In the original world, he was an otaku fan of Gundam and military science fiction.

He died in an accident and was reincarnated into another world. The Gundam works he had read before his death and the techniques in various military novels could be brought to another world.

How would he use the Gundam that Long Fei created? What waves can be caused in this different world?