World's Richest Man: I Leaped Across Time - Chapter 17: Birthday and Ford Mustang

“From here on out, I'll only do what I want. What makes me Happy”

After years at a dead-end job, Evian finally has enough and quits to pursue his passions but before he could even revel in his new freedom, tragedy struck and he became a creature of Decadence.

Condemned to a life of devouring souls in exchange for strength, Evian is pulled out of the world he knew and made to possess the body of a namesake in a different world of Magic and all sorts of wonder.

A world home to different races taking residency in their own separate corners of it.

In this new world, Evian will find so many opportunities opened to him and it won't take long for him to begin to indulge in those opportunities.

After all, Souls taste good but beauties- Beauties taste even better...

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A girl who calls herself a demon appeared before a timid student named Fumio Kijima. The girl claims to be a campaign girl from the demon world and she gives him the ability to “summon a room” from nothing but thin air.

At first he doesn’t abuse his power and uses it as a convenient ability in his every day life. But one day he is bullied by his classmates under a false pretext and is made to suffer. In the past he would have wallowed in misery and cried himself to sleep, but now he had a power to call upon.

“I will make them regret it!”

Using his powers to summon his “room”, he begins his era of confinement and brainwashing to achieve his goals.

You take up a student career.

Student career upgrade to lv.7

Acquired skills: primary school knowledge, junior high school knowledge, high school knowledge.

You take the college entrance examination,

You got a perfect score.

Your basic occupation has been upgraded to lv.9, and the job transfer system has been activated.

You change jobs to become a scientist, you gain R&D skills

You use research and development skills to get space fortress construction technology

You use R&D skills to gain starship technology.

You are invincible.

- Description from novelbuddy

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?