An Extra's Rise in an Eroge - Chapter 9: Lily’s "Service" I **

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

What will happen if your ordinary life becomes not so ordinary? What will happen if your old existence becomes anew? What will happen if the world that you know is changing?

Our heroine, Anne, is a 40 year old librarian, that got entangled in mythical magic, inside a mysterious fairytale book. When the disaster happened, she got thrown into another world, the kingdom of Valorian, where magic and lore are coming alive. A world where she becomes younger again, but with a wisdom and knowledge of a forty-year-old woman.

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.

Xiao Yanling traveled through time.

Yan Suisui, the cannon fodder and silly sister who transformed into the heroine of the Koi novel.

She is from the same mother, but her younger sister has stolen her luck, and she is the little lucky star favored by the group in the capital.

And she became a disaster star.

She was sent to the countryside and lived a life of stupidity. The whole village was slaughtered and her life was miserable.

The three brothers in the adoptive father’s family died without a burial place.

Twins are born from the same birth, but they have different fates.

Yan Suisui put her hands on her hips, and her words came true, and her words followed the rules, pointing out who was struck by lightning.

She wants to change everyone’s destiny! Take back your luck!

On the day she was brought back to the capital, the whole capital was eagerly waiting to see her joke.

But who would have known that the poor eldest brother was the youngest chief minister in the dynasty.

The second elder brother is already a general guarding the dynasty.

The third brother controls the world’s granary!

The aloof tyrant was standing cautiously at the city gate, waiting for his little ancestor to come home.

- Description from novelbuddy