DxD: System of the Harem King - Chapter 212: Challenge and Contract

A little ruffian who fought recklessly without any morals and bottomline accidentally time-traveled to parallel space and became a Key Case Investigation Team agent. The huge change in identity had him creating chaos in the police station. However, a strange miracle system helped him repeatedly solve mysterious cases, turning him into an impudent ruffian detective!

After the nuclear war, the world was controlled by twenty mega-corporations that established a global government. Governed by AI, it judged everything.Gao Xin, who had only wished to live a peaceful life, inexplicably became a scapegoat for the elite and, unable to pay the imprisonment fee, was sentenced to ten years of exile on Crime Prison Island!On this island, there were no laws, no constraints, the only order being the numerous game arenas set up by the officials.The criminals could only participate like racehorses for the entertainment of the elite.Yet, on this prison island filled with Radiation, cyborgs, and many powerful villains, Gao Xin had no strength, no talent, and no background—like a sheep thrown into a crocodile pool, no different from being on death row.How could an ordinary person like him survive under the oppression of the strong, the geniuses, and the wicked? Unless in this world, there was a path, a path that allowed even the weakest to continuously break their shackles.

“I don't want to die anymore, so I'll aim to be the strongest――!”After being stabbed by a random attacker, he was reincarnated in Japan, a place where 'demons' like yokai and monsters exist――and moreover, he was born into a family of 'exorcists' who exorcise these monsters!Exorcism is an important job that involves killing monsters, but it is also a dangerous job where people can die.Therefore, he――Itsuki, made a decision.In order to never die again, he would become strong.He aimed to be the strongest and practiced magic tirelessly since he was a baby――until he realized.“Huh? Isn't this too much?”This is the story of an exorcist who, despite being an ordinary person, became the strongest without realizing it due to excessive effort.

This novel is also known as Gu Daoist Master

Humans are clever in tens of thousands of ways, Gu are the true refined essences of Heaven and Earth.

The Three Temples are unrighteous, the demon is reborn.

Former days are but an old dream, an identical name is made anew.

A story of a time traveler who keeps on being reborn.

A unique world that grows, cultivates, and uses Gu.

The Spring and Autumn Cicada, the Venomous Moonlight Gu, the Wine Insect, All-Encompassing Golden Light Insect, Slender Black Hair Gu, Gu of Hope…

And a great demon of the world that does exactly as his heart pleases!

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*Gu (蛊) referred to poisonous insects in various cultures in South China while in folklore Gu spirits could transform into all kinds of species.

- Description from Novelupdates