Humanity's Greatest Mecha Warrior System - Chapter 1204 Asset Maps

In her third year living in this steampunk world, Ciel gained the ability to simulate both the past and the future.These simulations turned into a game where she could act without restraint, and after countless trials, real life became a replica she could navigate as though speedrunning it.Churches, potions, mutations, the Old Gods, witches, sealed artifacts… none of these have anything to do with Ciel. She’s just an ordinary girl who wishes for a peaceful life.She just happens to be particularly skilled at snuffing out danger before it even begins.

"I want to run away from everything."

Crossing into the anime world and have a rescue system that will pop out a quest suddenly.

Can I get items and abilities after completion?

Do I have to travel to another world?

But before that Yuuki needs to save the world of otaku? Even though he is a Yakuza?

Everything start from here.

(This synopsis looked like the one from my Hitotose Note).

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Only update, when I have nothing to do

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Cover not mine, it's from anime Hajime no Gal

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Grammar sometimes sucks but bear with it.

https://discord.gg/Q3MFzds

If you want to tell me there is a grammar mistake.

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https://www.patreon.com/akikan40

Maybe I'll full of energy to write your favorite fanfic.

The hero who was killed by the demon king ended up reincarnated as the son of the one who killed him! Thus began the life of the hero who donned in the mask of the ideal demon prince to topple his own kingdom while doing his best to prevent anyone from discovering his identity―― But to do that and blend into the demon tribe society, he had to kill his former comrades. Nevertheless, to become stronger, to save humanity, he had to walk through all kinds of paths of carnage! This is the tale of the demon race’s fake prince destroying his own kingdom.

O Hero, Trample Those Who You Should Protect!

TN: Most part of the other character in the novel is depicted from a non-human perspective so expect something that is completely different from the common sense of human.