The supporting character's harem is very normal - Chapter 23: Contract…

Her parents died in planned accident by her uncle. They used her in every way they can. They planned to sue her so she wont take her fathers company back. They want to destroy her life making her penniless. No one knows that she is the not the same girl who was played as puppet in their hands. Five years changed her a lot. Now she is a hidden genius still acting pityfull to take revenge.

Because of a broken net, Lin Changqing traveled to a terrifying world where warrior monks suppress the world, where demons and ghosts wreak havoc on the world!

Fortunately, Broken Net is not a mortal thing, it can capture everything in the world and endow it with a little spirituality!

Everything becomes a pet, a talent is born, Lin Changqing acquires a pet talent, and strengthens himself!

So in this world, there is another terrifying existence with countless strange pets!

“You thought I was holding a weapon?”

“No! It’s actually my pet!”

The bamboo stick that knocked down the big demon happily flew back into Lin Changqing’s hand!

- Description from novelbuddy

The daughter of a duke, the stuttering Maximilian, married a knight of lowly status at her father’s coercion.

An ordinary student, a wretched peeper, a cowardly teenager with a kind heart. In a terrorist attack, he inherited the knowledge of countless elites, embarked on a path of God Jagged Tu…

He is an artist!

He is a mathematician!

He is a psychology Doctor!

He is a master of fighting!

In fact, he is a man

Taken off raw site:

A wretched, dirty young man is working during the summer when he was caught up in a mysterious explosion. After that explosion, the young man is then left with the memories and knowledge of dozens of the world’s experts.

He has changed, his heart has become cold, iron-blooded. He became a killing machine, his mind turned mechanical, calculative. Everything goes according to his plans and calculations!

In this magical, slaughterous world, a door is opened for him…

- Description from Novelupdates