One Piece: Human God - Chapter 23: Sky Island II

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

- Description from Novelupdates

After the ‘100-Year War’ between the Necromancers and Priests, an all-time genius who’ll shake the power structure was born. “Am I a rare case or something? Do I have talent?” A potential beyond all imagination. He obtained his father’s undead army and entered the great Necromancer school of Kizen that divided the continent. Geniuses are geniuses, even when gathered among the elites. The research community was flipped on its head by the appearance of a new case. Professors wouldn’t leave him be alone, wanting to make him study directly under them. Officials from all over the kingdom and heads of organizations fidgeted over whether to scout him. “Professor! When can I make a Lich?” “Gimme a break. How talented are you? You’re crossing the line, honestly.” A genius among geniuses had appeared.

I may be a virtual YouTuber, but I’m practically an office worker. You’re saying I have the most subscribers in the group, except for the boss? Well, all those subscribers are on the official account, so it doesn’t really mean anything. Why haven’t I made an official debut? … So, what can you actually do about it?

Jiang Feng considered himself just an ordinary delivery guy.Until one day, a young man suddenly appeared, carefully grabbing his hand and saying, “Judge, Judge, I am the King of Hell.”“…” Jiang Feng replied, “King of Hell, King of Hell, I am also the King of Hell.”The King of Hell turned around, tearfully addressing the Black and White Impermanence, “I knew it, he’s been wanting to usurp my position for a long time!”—-“Those people all say that Heaven has the virtue of cherishing life, and tell me not to dwell on it anymore. Is it true that after people die, they don’t even have the right to appeal for justice?”“They look at life and death, I only judge right and wrong.”“Who are you?”—”The Judge.”