Naruto: Wooing Tsunade from Day One! - Chapter 451: Spoils of War

After an unexpected accident, An Luo was reborn as the young master of a business family. Even as his grandfather’s favored grandson, he seems to only be a cannon fodder in the brothers’ struggle to seize power. However, the most frightening thing is… the strange emotions that flicker in his little brother’s eyes as he looks at him. At that moment, overwhelmed by his brother, An Luo angrily thought: Could it be that he is doomed to never escape this vicious cycle of “brotherly love”?

An Luo(frowning): After rebirth, I don’t want to be together with some strange person.

Someone(suddenly appearing in the back, smiling): What did older brother just say?

An Luo: …Nothing.

- Description from Novelupdates

For unknown reasons, he finds himself transported to a parallel world's Japan, unexpectedly taking over the body of a soon-to-be high school student who had died accidentally. Surprisingly, he did not inherit any memories. However, the first challenge he faces upon arriving here is a language barrier...Just as he struggles to communicate with his new family, a heavenly voice arrives: the black technology system has been activated, and the initial item—translation konjac—has been distributed.This is the story of someone with above-average intelligence but almost no physical strength in the Classroom of the Supreme Power.

Elric lived a traumatic life since childhood. Being bullied, detested by his family & having no one who cared whether he lived or died. The accumulated loneliness & suffering puts him through severe depression & he decides to take his life’s final decision… SUICIDE.

One day, his soul hears a voice calling out to him.

«Wake up, Elric. I am the God of Darkness. And I’m here to give you another chance at life.»

To God of Darkness, Elric replied with only two words.

«Fuck off!»

Accompany the Protagonist in a journey to achieve an Impossible task he’s given as he aims to become one of the strongest beings in the world full of Magic, Mythical creatures, Dragons and Gods.

…

Author: Antihero protagonist who’s a scheming mastermind & doesn’t trust anyone. No Harem, Romance or Fan-service here. MC is an extremely smart & quick witted person who knows how to adapt to situations quickly. But he isn’t an Edgelord or a Psychopath who kills people for no reasons.

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!