Maybe a Fake Gintama - Chapter 419: The Human Body is Like a Little Universe!

Chang’an, Jan. 14th of lunar month, Tianbao Year 3 (744AD), Tang Dynasty.

For residents of Imperial City, what awaits them when the city enjoys its dazzling brilliance and joy of the Lantern Festival is an unexpected catastrophe that’ll destroy all. Tujue (a nationality in the north of ancient China), Wolfpack, kidnapping, assassination, rampant flames that scorch all…start the gear for the doom of and the Longest Day in Chang’an.

And the only hope lies in a one-eyed convict sentenced to death and the fleeting Twelve Hours…Will Chang’an, the city of prosperity, survive the longest day ever or will it burn…

Reborn in 2004, facing the age where pigs can be blown up, Lin Xuan, carrying the “Strongest Cottage King System”, started galloping…

- Description from novelbuddy

In the legends that were told, ten thousand years ago the twelve demon kings wreaked havoc upon the world, almost completely destroying it. Ten thousand years later, the late arriving Bella discovered that she had been screwed over by her reincarnation, the ranks of the Saviors are already filled and she has to change teams in order to pass the days. Having her gender changed into a beautiful girl… she endured that, not being able to join the righteous side and obtain cheat abilities… she endured, but what she could not endure, was that the world that she had transmigrated to was toxic beyond belief. No one here does their rightful jobs properly, be they heroes, demon kings, or creator gods… in fact, Bella felt as if they all had also started with the wrong faction!

Feng Ming was only 19 when he lost his life saving a child from death without hesitation. The grateful father of the rescued child grants Feng Ming a second chance at life. Unknown to Feng Ming, his soul has whisked away to a far away ancient land (resembling the dynasties of China).