It Seems That I've Slipped Into a Different World. Also, My Gender Has Changed. - Chapter 5: Leisurely Bathing, in a Giagantic Bath

In short: an old lover gave me a little piglet.

Qin Zhuopu, a workaholic, has been single for many years. As he reaches middle age, his family is desperate for a child.

Until one day…

“Mr. Qin, your son is already in primary school!”

“???” I have only had one boyfriend!

Seven years after the breakup, the old lover returned to the wealthy family with a little fat pig in his arms: “Zaizai is a big eater, I can’t feed him. Zaizai’s primary school homework is too difficult, I can’t do it. I’ll give you guardianship from now on! Will you let me go to your construction site to move bricks? Son, say ‘Mommy’!”

Mr. Qin: (No, I couldn’t give birth to such a fat kid!)

Later…

Onlookers: I heard that Mr. Qin has adopted an illegitimate child born to his old lover by some woman?

Mr. Qin: Let me introduce to you, this is my own cub!

- Description from Novelupdates

Raised by an abusive father, bullied by his tyrant classmate, and grew up without a mother and friends, Kaiju was chosen by the Tower as a player to participate in the trial. However, how could the Tower blundered about overchoosing its participants?Kaiju didn't have a choice but to participate on the Hellish Trial, the difficult there is. Without much preparations, Kaiju had to rely on luck to survive.[You have survived through a fortuitous encounter. You have obtained 10 Luck Points!Your 10 Luck Points are multiplied ten times…Congratulations!You have been rewarded with 100 Luck Points!]When Ladyluck decided to help him, can he survive the Hellish Trial and possibly complete it, when, in the history of the Tower, no one haven't yet?[You have formed a master and pet bond with the Savage Beast.You have obtained the title, Beastmaster!]With the beasts accompanying him, will he soar and conquer the Tower?

I’ve reincarnated as the reverse harem game’s villainess, the one and only step-daughter of the Eckart duke family.

But the difficulty just has to be the worst!

Everything I do will only lead me to death.

I must be paired with one of the main male characters from the heroine’s harem before the ‘real daughter’ of the duke family appears!

Two older brothers who always pick a fight with me on every little thing.

The insane crown prince whose route will always lead to my death.

‘I only see the heroine and no one else’s wizard, and also her loyal s*ave knight, too!

‘First, let’s take some of them which I see no hope in, out of the list!’

“I didn’t know my place up until now. From now on, I’ll live as quiet as a mouse so you wouldn’t care the slightest bit!

But why do their interests in me keep on rising every time I draw the line?!

In the 21st century Earth gave Birth to greatest genius ever. A genius who Master myriad of arts. Medicine to Engineering. Mathematics to Micro Biology. Weapon Designing to Environmental control. Music to Painting. Dance to Martial arts. He mastered Everything.