Those Classmates who Suddenly Disappeared - Chapter 17 - This is really hard to explain

As the grandmaster who founded demonic cultivation, Wei WuXian roamed the world in his wanton ways, hated by millions for the chaos he created. In the end, he was backstabbed by his dearest shidi and killed by powerful clans that combined to overpower him.

He incarnates into the body of a lunatic who was abandoned by his clan and is later, unwillingly, taken away by a famous cultivator among the sects—Lan WangJi, his archenemy.

This marks the start of a thrilling yet hilarious journey of attacking monsters, solving mysteries, and raising children. From the mutual flirtation along the way, Wei WuXian slowly realizes that Lan WangJi, a seemingly haughty and indifferent poker-face, holds more feelings for Wei WuXian than he is letting on…

- Description from Novelupdates

The End is finally here, but humans struggle and decide to fight to the bitter end and use all of their weapons. However, all of that was useless, and billions died.Until the first humans invaded the enemies' worlds and returned with powers after awakening them, they finally had the chance to fight back and defend their lands.Many years have passed, and humans have yet to obtain any real victories. Terry lost everything since the monsters and the overlords came to Earth, and he waited patiently and trained every day until he had the chance to awaken his power. Despite doing well on his first attack, Terry didn't awake any power...However, when he returned home, he confirmed that his power had indeed awakened... he could see weapons' status, and they could gain experience when he used them or killed monsters with them. Soon, he will come to realize that no other power is better than his!

Rules exist to be broken, and every loophole is a weapon. Trust no one, and annihilate those who deserve revenge.Granger Reiner never asked to be a champion, but fate chose him as the 101st contender for the goddess of Ascension—a deity mocked as the weakest among the pantheon, with 100 failed champions in just five months.Armed with a unique system and the ability to create barriers, Granger is thrust into Agrasia, a world teeming with treachery, to compete against other champions and conquer the Endless Dungeon.What he discovers is far worse than he could imagine: betrayal lurks at every corner, allies are fleeting, and the game is rigged.Learning the hard way that fairness has no place in a world built on lies, Granger transforms his weakness into his greatest strength. With vengeance as his driving force, he sets out to destroy the system, expose the truth, and turn the goddess’s mockery into triumph.In a world where everyone is an enemy, the 101st champion will stop at nothing—even if it means taking on the world itself.

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.