A Practical Guide to Evil - Chapter Book 7 43: Serolen

[Read up to chapter 5, you won't regret it.]Haru Mizuki died the lamest death possible: alone in his room, playing a hentai VRMMO. No heroic sacrifice. No tragic accident. Just... pathetic.But instead of oblivion, he wakes up in Aethelgard.Cursed by Chronia, Goddess of Time, Haru gains an ability no one else has: he can't stay dead. Every time he dies, he loops back to his last checkpoint. What seems like a curse becomes his greatest weapon, infinite retries mean infinite opportunities to learn, train, and seduce.And seduce he must. Because Haru's cheat ability, Touch of the Goddess, lets him steal powers from anyone he touches... but it works best through intimate contact.Armed with death loops, a hacker-class system that lets him sabotage rival players, Haru begins building the ultimate multi-species harem. But he's not the only player in this game, and they all want the same thing: absolute domination.

Dreaming back to the Tang Dynasty, being an ordinary person, greedy for money, lustful, debauched and free.

- 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