From Idler to Tech Tycoon: Earth - Chapter 37: The Day That Started It All.

Due to a bug in the game, Ren Changsheng accidentally left the game idle for ten million years.As he watched the endless stream of experience points, all Ren Changsheng could think was, 'I really do not want to level up!'

Past life, her spirit root was dug out from her body. She had wholeheartedly dedicated herself to the just path, but she was sentenced as an evil demonic cultivator.

Programmer Li Daochong desperately develops the game code, dying. After waking up, being born again in a ghost-invading future comprehension world, isn’t that a pothole?

However, Li Daochong brought his own ghost upgrade system, which made my green onion. Others are devilish and scared, and they rush to hell. Hey, isn’t this the tip of China? I want to eat, drool!

Eating is not the most important thing. The key can be upgraded. How many levels does it take to finish?
　　
“Li Daoyou please stay, people want to go to the edge of the magic field on the edge of the magic field, can you accompany others? People are afraid!” Hongyang fairy is dripping at Li Daochong.

“Li predecessor, can you please go with a younger generation to go to a ghost dragon?” A white-haired girl who is more than two hundred years old can look at Li Daochong helplessly.

- Description from uukanshu (translated)

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?