Be the Hardest Working Demon Cultivator! - Chapter 58 - . We also have fine traditions here.

Yu Shanshan, who has been tyrannical and lawless for 20 years, suffered retribution at the age of 21. She changed from a little ballet princess of 45 kg to a poor and fat one of 90 kg.. Apparently, eating was the most important thing in her life. Her success in losing weight was far away.

However, one day, the father of her child who had disappeared for four years came back. From then on, Yu Shanshan was forced to embark on a diet that was worse than death.

- Description from Novelupdates

When Peter is transported to a brutal system-driven world, where stats, skills, and paths to power are granted upon turning eighteen... He gets nothing.Thrown into a military training regime where the weak are discarded and the strong survive, Peter should have been erased.Alongside Thea, a fierce warrior, and Elric a determined healer, Peter claws his way forward. Creating and rediscovering the secrets of Cultivation and World Force.But as he defies the rules of the world, the world starts to notice.

What does it feel like to be hunted down by the whole just for being overpowered?___For centuries, the realms feared one thing, the birth of a child under the Blood Moon. A cursed child with the power to destroy everything.Every two hundred years, it happens. And every time, the realms unite to erase that child before their powers awaken.But this time, the Blood Moon didn’t rise. And yet, the child was born.Kaizen, 18 years old, was believed to be powerless, an ordinary hunter with no magic or magic core. What no one knew was that his abilities had been sealed since birth. Not just one, but all five elemental powers, water, fire, earth, ice, and shadow.The same power that once shattered the balance of the world.After a near-death encounter, the seal breaks. His powers begin to surface—unstable, dangerous, and impossible to ignore. Along with them comes a system that forces him to evolve and grow stronger.Now, Kaizen must hide the truth, survive among hunters, and face enemies far beyond anything he imagined. Because if the realms find out what he really is...They won’t hesitate to kill him.They promised this curse would never return.They were wrong.

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?