It turns out that my Yandere playmate online is my Homeroom Teacher - Chapter 8: This is it... the sleep over...

A teenager who unexpectedly gets transported to the modern world from ‘the world of the immortals’ . He finds himself in the body of an ordinary guy. He wants to go back to his world and for that, he will have to practice to get stronger and investigate the reason why and how he crossed through to this world.

[He is the villain in the house fighting essay, the roadblock in the spoiled essay, and the negative teaching material in the imperial examination essay]
His father joined the army and was named a marquis, but Mrs. Hou is not his mother, what should I do?
The stepmother seems to be transmigrating, gentle and virtuous, but in fact she wants to nurture him, what should I do?
The grandmother is snobby and wants him to give up the position of the eldest son. What should I do?
When preparing for the imperial examination, the relatives make trouble and want him to fail the examination. What should I do?
——The above answers are all in the “Complete Explanation of the Reverse Textbooks of the Imperial Examination”. This book covers family disputes, difficulties in the imperial examination, troubles in the officialdom, and the rules of power and ministers. I have a book in hand, I have the scientific test, and the teaching will not give a full refund!

Later, when the Xungui family taught their children to study, they would always take Xiao Jingduo as an example: “Study well, don’t go astray. Don’t imitate him, you won’t disgrace the words of the sages.”
* * * * *
People in the world have mixed evaluations of Xiao Jingduo, and what he is most criticized for is that he has no literati spirit, and is willing to be the sword of the regent princess and work for the princess.
Until later, Xiao Jingduo married the princess regent.
Courtier: …………No wonder!

This article is also known as “The Revenge of the Original Spouse”

- Description from novelbuddy

Xerox Zee had always thought of himself as an ordinary guy—just another face in the crowd. That was until his 18th birthday when his System finally gets Unlocked!.The System revealed a shocking truth: the world he lived in was exactly the same as the plot of a novel he had once read!But instead of being helpful, this turned out to be a big problem.Main Character : “I’m meant to save the world and become the strongest. Everyone else is just there to help me along the way!”Xerox Zee : “Hold on... am I just one of those people there to make him look better?”It seems like I'm just a stepping stones!

“There is no god, only the echo of our fears, bound together in a symphony of false hope, woven to make this endless cycle of pain bearable... But I refuse to be just another note in their song. I will not be silenced to protect the gate you so desperately uphold. I don’t care for the blind masses; they are but shadows, moving without purpose. If I cannot run, I will walk. If I cannot walk, I will crawl. If I cannot crawl, I will roll. And if all that remains of me is a severed head, then I will still glare at you with the scorn of the relentless.”...In a world where Hunters fight to keep humanity safe from monstrous invasions, Timothy Walter is nothing more than an E-rank weakling, expendable, powerless, and barely surviving.That changes when a forgotten dungeon forces him into a deadly trial, awakening ancient rulers from across races.Bound to the weakest among them, he inherits a power unlike any other: “King Player.”Now, with a system that defies all logic, Timothy must carve his path, facing enemies both human and monstrous, as he ascends from the lowest depths to claim a throne none believed he could reach.