I am that male friend in the harem story - Chapter 283: Shutter!

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

To take a dragon's hoard is to challenge death.The greatest of the sea-drakes wakes, curled on his silver throne; but there is no silver. His hoard is stolen. He rises, screaming, and chases the thief to the ends of the world—only to be shot from the sky.But dragons do not die easy, and never one with such festering hatred. A dungeon core rises from his corpse.If he intends to survive so near the cove of pirates that slew his past self, he'll need to master his powers—and quickly. For these pirates are dragonslayers; they won't be felled by mere mushrooms or spiders.Beneath the lawless Calarata, the young dungeon core will have to fight to survive; and one day, he will return death to the man who killed him.

After reviving unexpectedly, the concubine’s daughter was no longer a coward like before, but a hard nut.

Flamed her up and bullied her?

Come on!

She came from the 21st century! How could she willingly embrace such destiny?

“Since you ask for it, see how I will torture you!”

She punished the scums and struggled against bad minions!

See how the concubine’s daughter Dong Ling would stand up and master her own fate!

- Description from Novelupdates

Accused by his enemies, Tang Yin was led to a dead end and died at the hands of his enemies. Even so, fate gave him a new chance, and his soul traveled to a lower world, where he managed to reincarnate.His new body had no cultivation and no family either, so he was now a total cripple in an unknown world, with enemies lurking at his door.Yet, he is the proud Divine Heir, dubbed the 'Divine Son' of the Upper Realm. How could something so simple stop him?That is why he will forge his own path and rise again, this time by the hand of a mysterious power that belongs exclusively to him.'Even if I don't understand why I was chosen as Divine Heir, I will create my own path and forge my own power.' He thought.At the same time, a strange and mysterious system with an attractive power, which it said could help him complete his revenge, appeared before him.[You must become the Host of the Domination System][Do you accept?]