The supporting character's harem is very normal - Chapter 9: Going to the Karol Empire?

Graduate student Yi-han finds himself reborn in another world as the youngest child of a mage family.

– I’m never attending school, ever again!

‘What do you wish to achieve in life?’

‘I wish to play around and live comforta-‘

‘You must be aware of your talent. Now go attend Einroguard!’

‘Patriarch!’

My future would be guaranteed once I graduate. For my future!

The little handsome son-in-law passed through a world as waste material and the husband of a wealthy family. But because of his lacking aptitude, the wealthy family had driven him out. So he worked hard and found a more powerful family’s thighs to hold onto. Soon enough, he became the strongest son-in-law and husband in history.

In this world, it was impossible to practice martial arts. It was futile so he might as well take advantage of his wife’s thighs and maintain a comfortable and leisure lifestyle.

He’ll train his wife to become the strongest and best person in the world.

“Whoever dares to provoke me, let my wife kill you!”

- Description from Novelupdates

After three days of working nonstop, Cheng Zhaoci has transmigrated (read: had a stroke) as is everyone’s wish.

What does it feel like to transmigrate into a male, the rarer s*x of the insectoid race?

Cheng Zhaoci would reply, ‘yeah never mind that, there is still work that is my job to do.’

One day, the internet of the insectoids that had a sore lack of entertainment media suddenly featured a new account that had short serial comics. The comics had sweet love, passionate fighting, and all sorts of imaginative stories. Many fans flock to follow this account. Of course, many shemales were sceptical of the 1-to-1 monogamous love depicted in those comics.

Later, when Wing Commander Wei Zhuo was deep behind enemy lines, his xiongzhu, the Wing Commander Cheng Zhaoci came to rescue him without hesitation. That is when the shemales realised – there certainly can be sweet, sweet, love. It just doesn’t belong to them.

The shemales only want to smile and wave them away.

- Description from Novelupdates

As a cultivation genius who has achieved a new realm every two years since he was a year old, Wang Ling is a near-invincible existence with prowess far beyond his control. But now that he’s sixteen, he faces his greatest battle yet – Senior High School. With one challenge after another popping up, his plans for a low-key high school life seem further and further away…