Beast Tamer Ascension - Chapter 120Book 2: : The Former Legend

Xu Jun finally defeated the BOSS–the Dark Demon King, in this stand-alone, virtual reality game. When he wanted to go out to browse Weibo and express his mood, he suddenly encountered a game BUG and immediately passes over to the game world.

He became the man who finally took down the Great Demon King in this world. Gratifying! The attention of millions of people!

……However, he did not know the development of this world was not the same as the game, the Demon King did not die, rather his soul entered into Xu Jun’s body; this Demon King knows of all the stupid things Xu Jun does everyday…….

- Description from Novelupdates

Why do Gods of Transmigration love to murder their benefactors instead of asking for their help a normal way?That's how Karl got started as well. Murdered by a goddamn goddess, dumped into another world, and told to save her from her problems. You'd think gods would have their shit together, being gods and all. But apparently they do not.Karl, a teenager, who felt the inequality in his already struggling life more than ever before, finds himself transmigrated as a vice principal of a magical academy. The council accuses him of his incapability and his inexperience, believing he's not fit to lead them to the top.[ Mana meter unlocked: capacity F ]Even his cheat skill seems like a useless gimmick as Karl faces the worst students of the academy and the most difficult professors.That goddess better sends his paycheck to his parents in his old world because Karl isn't going to work for free, and if he does this job, the least she could do is pay off their debts.But then again...“I won't accept this fate handed out to me. This world might offer me the fantasies but they can't give me the warmth of my loved ones.”Would he be able to meet the Goddess and return back to his world or would he gets buried under the history of the lands that had once housed Gods and Demons alike?

He rose from abjection and achieved eternity in glory.
He embraced the prettiest beauties and killed the strongest opponents.
He was able to shift the clouds into rain and cover the sky with one hand.
He could overrun the entire world and go anywhere as he pleased.
He pacified wars and held the world in awe.
He was matchless in the world.
However, his hair turned white overnight for his beloved woman and he was on the verge of death.
He was surrounded by enemies who were trying to take his life.
He struggled his way to become mighty and fought for everything he cherished.
For this age, he was the only king of the Dark World.
His name was a byword for might.
As a man living in the world, his only ideal was to pursue brilliance.

After breaking up with his girlfriend, he accidentally acquired a genius system and rose from there against the heavens, becoming invincible..

- Description from Novelupdates