The Older Brother of My Student is My Secret Crush - Chapter 19: Candy and Medicine.

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

Everyone in the City of Jing thinks that bestowment of marriage between Xian Junwang and the daughter of the Yi’an Marquis House is to insert a fresh flower into manure.

After an unfortunate encounter with Truck-kun, Kieran Darkmoon suddenly found himself transported to a world full of women, where men are as rare as a unicorn and the cultivation game is anything but straightforward!With a lewd system that rewards him for getting frisky, Kieran quickly learns that pleasure is the path to power! From racy encounters with sect elders to sneaky adventures in the weapon pavilion, every sexy escapade earns him points—and who doesn’t love a good point system? As he navigates his way through a harem of powerful women, bizarre quests, and comically awkward situations, Kieran is determined to rise above his circumstances (and maybe get some snacks along the way).Join Kieran as he juggles dual cultivation techniques, earns outrageous bonuses, and uncovers hidden treasures—all while trying to stay out of trouble (and in others pants!). With epic battles, outrageous rewards, and enough steamy moments to keep you blushing, “Lewd System in a Cultivation World Filled with Women” is a hilariously naughty adventure you won’t want to miss! Buckle up for a journey where every encounter is a chance to level up in more ways than one!

Xin Yun, a sarcastic young man, traveled to an unknown world by chance, but lost his chance to become the strongest because of his obsession with women... or sex. In a collision of the powers of nine powerful men, an incredible thing happened. Xin Yun was reborn back to the time when he traveled to the Isekai world. A fantasy journey is about to begin... [The comic adapted from this novel is popular all over the world]