Reincarnation Of The Businesswoman At School (WN) - Chapter 1331: Han Wenling’s Jealousy Towards Gu Ning

Perhaps it is the choice of fate. As a senior otaku, Qian Lingfeng got the “steel shell system”. However, when he swept the world with the system, became a local rich man, made all kinds of beautiful women, opened a harem, and realized the ultimate fantasy of thousands of otaku, he found that things seemed far from simple!
When the end comes, biochemical zombies suddenly come down, fierce beasts are in power, bloodthirsty zerg roam to kill the world, and human lives are comparable to dirt. Where will weak human beings go in this world? Is humanity going to be extinct? Or … can an otaku save the fate of the human race?

- Description from Novelupdates

16 years old-- most boys would be falling in love, as their hormones all rise to unprecedented levels. Most boys at Riley's age would have dreams; dreams that will slowly grow into passion. Riley, however, at age 16... killed the world's number 1 superhero.

This text has been published under the name “Amidst the Falling Stars”.“President, I've found a little Baozi who looks a lot like you.”“President, Baozi says he doesn't have a real dad; he's a test-tube baby!”“……”He'd only been gone for two days, only to be told by his secretary that he'd been high-grade counterfeited, and it was a mini version of him!Test-tube baby?Thud!One phone call, city-wide search for Baozi, and also Baozi's... mom...Half an hour later...“President, we've found Baozi's mom... it's just... the young assistant you just fired.”“……”Before meeting Ou Mucen, Ye Ning was both the inconspicuous adopted daughter of the Ou Family and the true hidden master of the Antique Circle. She was exceptionally talented and intelligent, content with living a simple life.But after meeting Ou Mucen, her persona collapsed...

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.