Maou-sama no Machizukuri! ~Saikyou no Danjon wa Kindai Toshi~ - Volume 1 Chapter 8

Five years after being kidnapped and ens*aved in a city full of Witches, I became the only male Witch in the world!

Demons are lurking, and there are thousands of races.

If you don’t pay attention, you will eat the weak.

But all this seems to have nothing to do with Li Dan, because as long as he is self-disciplined, he can get corresponding rewards and become perfect and invincible!

“Congratulations to the host for insisting on exercising every day and obtaining a top-level body forging exercise.”

“Congratulations to the host for insisting on basking in the sun every day and getting a top shield.”

“Congratulations to the host for insisting on playing ball every day and obtaining the full-level alchemy talent.”

Crowd: Why does he not do his work every day, and his cultivation keeps rising?

“Ding: Release a new self-discipline task, insist on confessing the beautiful women in the sect for a month, and reward a mysterious talent.”

Li Dan: “Everyone is busy first, I have something to do, so I will leave first, senior sisters, your Dandan is here-“

- Description from novelbuddy

Ji Huan’s parents both died in a traffic accident.
Unexpectedly, his older sister also meets the same fate.
Yet everything starts when he says “goodbye” for the last time.

Hunting monsters? Genetic comparison?
Ji Huan flees with his older sister’s posthumous child to his hometown, Bade Town.
The three Grandpa, grandson, and nephew all live interdependent days.
However, inside the swaddling clothes is not a human baby,
But a monster…

Black egg body, white ring eyes, red mouth.
A child, ah! Doesn’t he have two eyes and a mouth! Resembling an egg, he is Ji Huan’s cute nephew!

Vermilion tiled wall, white lotus pond, convalescent courtyard.
This entirely neatly handsome and elegant young man: Ah Jin.
However, he told Ji Huan about the secrets of the monsters and discreetly taught him.
Bade Town is also slowly being covered in monsters…

Or, the record of a small countryside monster’s growth.

- Description from Novelupdates