World Development System - Chapter 254

After three years of being married to an unfaithful wife, the multi-billionaire is chased out of his home!

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.

After an unforeseen circumstance, Kayn is abruptly transported back in time, accompanied by someone he once considered his most significant foe. As he delves deeper into the past, Kayn discovers the truth behind the events that led to his betrayal by both his guild and allies, as well as the agonizing reality of being abandoned by those he was sworn to protect. Fueled by a deep desire for retribution, Kayn vows to take matters into his own hands and right the wrongs of the past, proclaiming his intent to become a Kingmaker and shape the future according to his own vision.

The eldest son of the assassin aristocrat Tuatha Dé.

The skill, experience, knowledge of the previous life, magic, all of which grows his power as an assassin.

Excellent assassins pass through. He was usually admired as the ideal lord, and behind it wielded a blade as an assassin aristocrat.