You’ve Got The Wrong House, Villain - Chapter 121

She shouldn’t have got drunk, so she wouldn’t have court the troubles.
She slept with a handsome man and would be sent to the police?
Oh, my sweet Jesus…
“So you just ran away like nothing happened after you slept with me?”
“Old jerk! Even if I had the initiative, it was you who took advantage of me!”
As a saying goes, the more spoiled a president gets, the more likely he becomes a scumbag.
An adorable ‘wildcat’ vs. a scheming frenemy.
This was a love rivalry between a modern Cinderella and a Big Boss.
As time flew, the world was like a fleeting show.
When they met again after several years of separation, he held her hand tightly and swore that he would never give her any chance to leave him again!
Finally, he asked her to marry him and pampered his cute wifey with his endless love.

- Description from Novelupdates

After being kicked out by her family, she turned out the real heiress worth billions, and people around her got to know it.Her family regretted deeply and demanded half of her fortune as repayment for bringing her up. She sneered and used a truth-telling talisman to expose their plots.A scumbag had always been pestering her and wanted to get back together. She easily made him “meet his ancestors” every night.Moreover, her cousins had looked down on her, regarding her as a disgrace.Surprisingly, the chairman of a rich family came to her and said, “As long as you can save my daughter, I'll meet all your demands!”Another rich family, who had been at feud with her new family for a long time, also shamelessly came over and said, “As long as you can help us, our family will be very grateful for the kindness of your family!”Later, even the rebellious cousin became her follower, claiming, “She is my only sister! Whoever dares to insult her, I will curse their entire family!”Her new family finally realized that their little poor girl was actually a big shot!“I need to draw spells, get rid of evils, save people and chase that guy! How busy I am!” She said in distress.That guy, “Actually, you don't need to chase me. I'm already yours.”

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?