MTL - Harry Potter’s Book of Sin - Chapter 2598 beauty slap

A 34-year-old NEET otaku, chased out from his house by his family, found that his life is reaching a dead end. He then recalled that his life could actually have been much better if he had made better choices in the past.

Villain System: Let the Young and Naïve Duchess of the Cang Court Principality, Sylvia, Experience the Betrayal of Her Loved Ones, and Achieve Transformation and RebirthTransmigrating into a Western fantasy world centered around beast taming, Xia Ya stared at the beginner mission in front of him, lost in thought.Sylvia—the legendary “Silver Witch of Cang” recorded in history—had already ascended to legend status five hundred years ago. After establishing the White Chalk Tower, she vanished without a trace, never to be seen again. And as for the Cang Court Principality? It had long since been destroyed. How was he supposed to complete this f***ing mission?This system was five hundred years late!Yet, the mission reward was simply too tempting. After much deliberation, Xia Ya made a decision that would make his ancestors roll in their graves—[To Deceive History Itself]The capital was gone? Fine. Then I’ll just write my name into the duke’s family records and become the older brother of the duchess. No objections, right?Modify relics and ancient texts? Sure. Let’s say I was manipulated by cultists, falsely accused Sylvia of an imaginary crime, and personally exiled her. Then, later, I came to my senses and perished alongside the mastermind behind it all. That sounds reasonable, right?[The One Forgotten by Time][The Heartless Tyrant][The King Who Turned His Back on the World]One hidden truth after another began to resurface.[The Silver Witch’s Diary]Waking from my self-imposed slumber, my memories are in tatters—except for one, still deeply etched into my soul: the pain of betrayal.Recent archaeological discoveries have revealed the truth…It turns out that the principality had already been corrupted by a cult. Not long after my exile, an evil god descended upon the royal capital, annihilating all life.So… my brother did all of that… to save me?

There was nothing left to lose in his life.He had lived as a hero. He had started at the bottom and worked his way up to the top, at the end he become the best, yet he had always been betrayed by those he had tried to protect.Humanity did not deserve his protection.When everything went out and he could no longer even hope to beg for his life, he could do nothing but look up at the blood-red sky among the corpses of demons and angels.He wished for one more chance, just one more chance.And when that chance was given to him, he swore that he would change everything. He would no longer be a hero to save people, but an anti-hero to save the world.Sacrificing hundreds of people to save an elf, poisoning hundreds of people to save a group of half-demons.He didn't care about any of that anymore, he would protect those he cared about and send everything else to hell.Not even the gods or goddesses could stop him.

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?