I Became a Student at the Transcension Academy - Chapter 255

Doomsday comes, and human beings enter the heavenly world.
Ten years later, Yang Chen, who was betrayed tragically, returned strongly with the Tianyu bug. In this life, he vowed to make the betrayal pay the price. He has a powerful bug bonus, just like an open hang. Frightened to hear…

- Description from novelbuddy

“Noob. Weakest. Hardstuck .Tryhard. Trash. Pick a word, it fits me.”In a post-apocalyptic world overrun by monstrous creatures known as Eaters, some humans give up their humanity to gain a powerful weapon fused into their right hand. These people become Eater Blades, warriors who must hunt and feed their weapons with Eaters to rise through the ranks and prove their worth.In a world where rank means everything, Johnquis remains unranked.Why? Because his weapon is a chain. Everyone laughs, calling him “Leash Boy.” They mock him, never realizing the truth. That his chains aren’t made to cut… they’re made to control.This is a world where zombie-like monsters evolve, and a strange game-like system controls everything.Grind, rank up and evolve.Watch how Johnquis changes the game and tames the apocalypse.

After receiving his terminal illness diagnosis, Chu Xun could finally let go of everything. The most important thing of being alive is after all, one’s own happiness.

Dumping a jerk, getting back on his retarded colleagues, firing his dumbass boss, staying in a luxurious house, enjoying a feast and bedding a young, energetic and handsome guy—Chu Xun very coolly did what he didn’t dare to do in the past!

All his savings were spent and as he laid down waiting for his death, the doctor apologetically told him, “I’m so sorry, we misdiagnosed.”

“…” Chu Xun felt faint.

He did another checkup and thought, he did feel unwell recently though?

The doctor looked grim.

Chu Xun’s heart skipped a beat. “Don’t tell me it wasn’t a misdiagnosis after all. Am I sick?”

Doctor: “You do not have a terminal illness, but you are… You are pregnant.”

Chu Xun: “???” Ermm, he’s a guy?

And later, the child’s father, that young, energetic and handsome man, who also happened to be a 26-year-old billionaire, Lin Yanchen, appeared and handed out a marriage certificate already signed by him. “I’ll take responsibility. Let’s get married.”

Chu Xun only realised now that his 30-years-late love life, as though blooming blossoms, was flooding in.

- 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.