Code Zulu Alpha: Nerd in the Apocalypse! - Chapter 1231 I have some ideas.

Her previous life was pitiful. Soon after her birth, her father abandoned his wife and daughter for his first love and left for the city. Her mother left her at her grandmother's house, being indifferent to her suffer, and even schemed to marry her to her couin's lover. What's more, after escaping to the city, she was betrayed by her stepmother and stepsister, being stolen one of her kidneys! Without knowing the truth, she mistook them as benefactors, serving them just as a maid. She later found the truth and accidentally acquired a special space, enjoying good life for about two years before dying suddenly and inexplicably.After being reborn, she strived to avoid the pitfalls of her former life, yet was nearly overwhelmed by the truth when she discovered it.It turned out that the stepmother she hated most was actually her biological mother, and the person she most respected in her former life was actually her father.In her previous life, she had never been in love, and she was uninterested after her rebirth until she inadvertently stumbled upon love and extreme doting.In his previous life, he was also pitiable, but later became extremely wealthy. In this life, because of her, he became even more domineering.

Riven's life turns upside down when Elysium's Multiverse absorbs planet Earth. On the fringes of a newly growing galaxy where magic and fantasy are both very real, the inhabitants of three merged worlds must find a way to survive the trials Elysium sets out for them. Riven finds himself thrust into a whirlwind of chaotic events just trying to make it out in one piece, learning how to craft the dark arts to do his bidding as he strives to keep his loved ones safe.But the powers of this new multiverse have other plans for Riven's tiny planet, and Elysium's worldwide trials are just the beginning.*A mixture of brutal violence, the darker aspects of humanity, and comedy. Centered around a blood mage / warlock and his demonic summons. This story is full of gory fight scenes, you have been warned.**Inspired by 'Defiance of the Fall', 'Primal Hunter', 'The Legend of Randidly Ghosthound', and 'Infinite Realm' series. I hope I do them justice.*

Klein’s greatest wish is to transmigrate to another world and live life in an isekai, just like in anime, manga and novels. However, fate is on his side and the typical truck that the main characters always carry in isekai runs over Klein. But, to his bad luck, he lived a few more days in the hospital and, just on the day he died, Klein heard a ⟨⟨-DING-⟩⟩ that he knew it meant. That was the day of his death, but also the beginning of his adventure into another world.

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?