MTL - Beast Piercing The Heavens - Chapter 1361 Yes... Great!

Xin Meng woke up from his dream and found himself entering a horror game. He must work with five other people to struggle and survive in a terrible world. Every effort is made to get back to reality, and the name of the game is… “Infinite Reincarnation”.

Soon, Xin Meng will realize that the human heart is far more terrible than the game.

- Description from Novelupdates

Kaito Nakamura, a shy university nerd, thought he’d found love when the stunning Aiko chose him as her boyfriend. Their sweet, fluffy romance fills his lonely world with hope—until he discovers she’s cheating on him with multiple guys, reveling in the taboo thrill of betraying someone so innocent. Heartbroken and humiliated as explicit photos of her circulate online, Kaito’s tears are interrupted by a mysterious popup: the “Revenge NTR System Beta.” Promising retribution but with a chilling condition — he can’t break up with her.Contains Ntr, read at your own risk

Battle Emperor Fu Sheng is the most popular player in the game, The New Age. Everyone believes that only he will become the champion in the final battle! His real name—Lin Jie. The reason for his participation in the battle is to win the Capsule of Revitalization for his injured mother and sister. With the Broken Blade, a Heritage weapon, in hand, he finally makes it to the final battle! Only then does he realize that his best friend had betrayed him! After his devastating defeat, Lin Jie is shocked to realize that he had time-travelled all the way back to a few years ago when the beta version of The New Age was just about to launch!

With all my knowledge of the game…
Pros on the leaderboard? All of them my underlings!
First kill of a BOSS? Mine!
First clear of the exclusive dungeon? Still mine!

Whatever I lost in the past, I’ll get them all back!
Whoever brought me trouble, you’re as good as dead!
When I have the chance to do it all over again, I WILL BE EMPEROR!

I am Fu Sheng, the STRONGEST warrior in The New Age. No one, absolutely no one, can stand before me!

- Description from Novelupdates

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.