MTL - Bottom A, Top O - Chapter 14 Nie Zihang's black eyes sank.

The world had changed when the System arrived, alongside the Cataclysm that filled the world with monsters. The technology was gone, replaced by classes and skills that allowed the people to fight back. When Devon ended up as a Blacksmith, a class that didn’t grant Intelligence, he had to face the reality, that his old career that he loved - mathematical sociologist - was over. Instead, he had ended up as yet another discarded member of the production class, overshadowed by the existence of the System Shops to the point of total marginalization. But, what if all he needed was to reapply his scientific thinking to the System...

A moment of vulnerability results in Ye Beibei being manipulated into marrying Young Master Gu, a wheelchair-bound man.

Having imagined an idle and prosperous life within an aristocratic family—who knew that she would instead be enslaved into becoming a young nanny every single day?

Ye Beibei smacks the table. “Liar, I want a divorce!”

Young Master Gu pushes a cute baby in front of him. “You want a divorce even when we already have a child? Dear Wife, wake up!”

“…” Ye Beibei stares in confusion at the adorable baby who looks exactly like her.

Can anyone tell her when she gave birth to a child?!

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Wang Yi was reborn into a world that swallowed the starry sky. After eighteen years of ordinary and extraordinary, he finally met the conditions on the eve of graduation from high school, activated his own golden finger, and signed in for the first time.

[Ding, congratulations to the host for successfully signing in, signing in for the first time, and signing in to the earth, special rewards will be given to reward the first karma of the Nine Tribulations Secret Code! 】

[Your genetic level has increased three times! 】

“…”

- Description from novelbuddy

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.