The Great Demon System - Chapter 19: The Raging Storm

Zhang Siyi, a graduate student of architecture department went back from overseas seeking for work, he had a heated fight with his ex-girlfriend in a cafe. Angered, his ex-girlfriend was about to splash a cup of coffee in his direction but he managed to dodge it. As he stepped back, the misfortune was met by the handsome guy next table instead.

The following next day, as Zhang Siyi headed for a company interview, he discovered that the interviewer was the same man who suffered the splashing of coffee.

Hopeless, Zhang Siyi thought this work was unalterably unattainable, but that handsome man unexpectedly “disregarded past grudges” and decided to hire him. Even more, the man had become his immediate superior.

To accept Zhang Siyi by the said man, he was moved to tears with such magnanimity and kind-heartedness. Never had he realized it yet that his “miserable” fortune has just begun…

- Description from Novelupdates

[Warning: Sexual content, lemons, comedy, MILFs, face-slapping, and a shameless protagonist!].....Creed Walden was a man of culture. Refined. Sophisticated. A true enjoyer of the finer things in life.Which was exactly why he ended up getting shot in the nuts.Who knew that messing with a gangster’s woman would lead to such unfortunate circumstances? One moment, he was enjoying the peak of pleasure, the next—BANG! Eternal darkness.But instead of fading into nothingness, he woke up… in a completely different world.A world he knew.It was the setting of a novel he had read ten years ago—a brutal, unforgiving wasteland where monstrous creatures roamed, and humanity teetered on the brink of extinction.The Apocalypse had begun.Here, humans awakened incredible talents to survive. Some became swordmasters, capable of cutting mountains in half. Others became mages, wielding fire and lightning at their fingertips. The strong ruled, the weak perished, and only those with true power could thrive.And Creed?He awakened… a summoning ability.Not bad, right? He could call forth mighty beasts, legendary heroes, or divine warriors to fight for him!At least, that’s what he thought.Until his first summon appeared.A gorgeous, sultry woman with horns, bat-like wings, and a very inappropriate outfit.A Succubus.It didn’t take long for Creed to realize the shocking truth—his summoning ability could only summon Succubi!The apocalypse was raging. Civilization was collapsing. People were awakening godlike powers to fight for survival.And here he was.Surrounded by beautiful, seductive demons who thrived on… other kinds of energy.Creed leaned back with a grin, his eyes gleaming with a mix of amusement and wicked excitement.“...Well, I suppose there are worse fates.”

The scum’s or villain’s long road of transformation was tentatively set to the world:
The abandonment of the educated youth’s wife (Completed)
The hidden marriage of the scum film emperor (Completed)
The best brother in the world (Completed)
The Phoenix male who destroy the bridge after crossing the river (Completed)
The treasonous general (Completed)
I’m an honest man (Completed)
To become the top scorer in the School of Agriculture (Completed)
The soft rice man’s self-cultivation (Completed)
The whole world is reborn (Completed)
I want to survive on a desert island (Completed)
The stallion male who has seized the opportunity (Completed)
The perverted self-salvation (Completed)
The spring of the loafer (Completed)
The misplaced life (Completed)
The miser career (Completed)
The ghost is out of feeling (Completed)
The Queen’s favorite husband (Completed)
The vicious girl with her godfather (Completed)
I want to be a good person (Completed)
I does not tear up the family (Completed)
The perverted common plant (Completed)
The Mary Sue’s men (Completed)
Every time I was reborn, someone wants to kill me (Completed)
The old people’s counterattack path (Completed)
The global evolution (Completed)
When I became a net red (Completed)
For you, good person (Completed)
His heart had white moonlight (Completed)

- Description from Novelupdates

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?