Reincarnated as an Energy with a System - Chapter 161: Rules

He approached her and announced domineeringly, “Ten million, you're mine!” Little did he know that she would smash his head and flee in panic! Five years later, for the sake of her young son, she endured humiliation and became his wife, always on guard around him, “Get out, what are you doing coming in?” His handsome face darkened, “Woman, you couldn't have forgotten that we are husband and wife, could you?”

Short, rich, and handsome, Lin Feiran was always the center of attention. But after transferring schools in his second year of high school, he discovered that his limelight was snatched by his Adonis classmate, Gu Kaifeng.

Traversing into another world, Zhang Xuan finds himself becoming an honorable teacher.

Along with his transcension, a mysterious library appears in his mind.

As long as it is something he has seen, regardless of whether it is a human or an object, a book on its weaknesses will be automatically compiled in the library.

Thus, he becomes formidable.

“Emperor Zhuoyang, why do you detest wearing your underwear so much? As an emperor, can’t you pay a little more attention to your image?”

“Fairy Linglong, you can always look for me if you find yourself unable to sleep at night. I am skilled in lullabies!”

“And you, Demon Lord Qiankun! Can you cut down on the garlic? Are you trying to kill me with that stench?”

This is an incredible story about teachers and students, grooming and guiding the greatest experts in the world!

- Description from Novelupdates

Masaru Ryunosuke is an outcast—a scholarship student in a school of elites, struggling to keep his head down in a world that looks down on him. But when a chance encounter with a vampire attack leaves him at death’s door, he wakes up to a new reality—he's no longer human.Now a ghoul, the lowest rank of undead, Masaru finds himself thrown into a world of ancient bloodlines, deadly supernatural creatures, and secret organizations hunting beings like him. His only guide? Akane Mikazuki, the cold and ruthless noble vampire who saved him, but only for her own mysterious reasons.Armed with the Cape of Dracula, an artifact of legendary power, and an unnatural potential that defies vampire logic, Masaru refuses to accept his fate as a weakling. If the world wants to treat him like a mere undead—then he’ll rise above them all and prove them wrong.As battles erupt between vampires, werewolves, assassins, and monstrous beings, Masaru must claw his way up the supernatural hierarchy before he’s devoured by forces beyond his comprehension. Because in this world, the weak exist only to be devoured.But what happens… when an undead refuses to stay at the bottom?