The supporting character's harem is very normal - Chapter 232 Will you hate me?

Zhang Xuan traverses into a foreign world and becomes an honorable teacher. 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 weakness would be automatically compiled. Thus, he became formidable.

“Emperor Haotian, why don’t you like to wear underwear? To think that you’re still an emperor, can you pay more attention to your image?”

“Fairy Linglong, if you continue to suffer from insomnia, you can always look for me. I have a way with lullabies!”

“You as well, Qiankun Demon Lord, can you cut down on the garlic? Do you want to stink me to death?”

…

This is an incredible story about the heritage between teacher and students, cultivating and guiding the world’s strongest experts.

Duwei is born in this new world from Earth without making any sound, he does not cry, he just stares at the people around him. As he grows he does not speak and curses this new world in which he is forced to live.

His father a great general of insurance he must have aptitude for something, nevertheless he is not more than trash. Ignored by his family as the “ret*rded” heir.

This is the story of your journey to discover the truths of this world and use the knowledge of your past life to remove your title of ret*rd, even if you have to become a devil.

- Description from Novelupdates

Crimson Vale Academy—where reputation is currency, and failure is a stain you wear on your sleeve.Behind gothic walls and spotless uniforms, students aren't just educated—they're measured, ranked, and pitted against each other in a brutal meritocracy. Privileges are earned, not given. The strong rise. The weak vanish.Enter Kairon Vale, a transfer student marked Rank D—the bottom of the bottom. No badge. Just a stitched black fang, branding him as “Obsidian”—a warning to others.In a system where points dictate your value, Obsidian-ranked students claw for every opportunity to ascend into the prestigious Golden or Platinum ranks—where comfort, power, and influence await. But for most, it’s a losing battle.Yet Kairon isn’t here to fit in, impress, or play by their rules. Cold, calculating, and impossible to read, he watches the system… and waits. Because while the academy judges worth by numbers and names—he understands something deeper:Everyone wears a mask. And every mask can be cracked.Let the games begin.

Ye Yun traveled to the Star Railway World and obtained the “Shop of All Worlds” system.Through this system, Ye Yun can sell items from across different worlds and invite guests from other realms to visit the Star Rail.His first encounter is with a space traveler named Stelle, and soon... many new experiences begin to unfold.Each time the shop's turnover reaches a certain amount, Ye Yun receives a reward from the system.