In the Second Generation of the Trench, He Changed To the Ruanfan Script - Chapter 12:

When others transmigrate, they are responsible for having babies with the male protagonist, and have a happily ever after. She is also a female protagonist when she transmigrates into various novels, but the female protagonist after the happy ending, when love between the couple is weathering, when the male protagonist is tired of the female protagonist, when he is cheating with a mistress, etc., and many other chicken feathers.

[Host, the task assigned to you by the system is, ‘After happy ending, the female protagonist’s bleak divorce life!’]

“Go away, s*upid system! I want to transmigrate to before ‘Happy ending’!”

One sentence introduction: Today is another day of happily divorcing.

Chicken feathers: small annoyances

- Description from Novelupdates

Bags of salt, spices and sugar stacked from inside the shop all the way out into the streets. Merchants loaded with goods going flooded the streets with their carriages.

What if a wisp, with zero EQ about human culture and habits, gains the opportunity to cultivate and finally achieve human form? Now he can enter cities, experience technology, and fight his way to the top, right? In this universe where wisps are seen as nothing more than cultivation resources, a wisp stands up to challenge the wisps destiny! Not without causing a lot of misunderstandings on his way, of course…

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?