The supporting character's harem is very normal - Chapter 122 You are just my pawns.

Zane Thaleward, born into a prestigious family known for their extraordinary magical abilities, struggles to meet the expectations placed upon him. Unlike his relatives, his magic is weak, limited to only the simplest of spells, making him the subject of mockery and ridicule.Despite the constant criticism, he remains determined to become stronger. One day, while searching the family’s library for a way to improve his magic, he stumbles upon a strange, ancient book. Little does he know, this discovery will change his destiny forever.

“You really want me to save people?”

Looking at the shivering victim in front of him,

Look at the [Owl’s Head Wire], [The Murderer’s Gift], [Universal Anesthetic], [Invisible Potion] in the item column…

Shiraishi touched the hideous mask on his face and fell into deep thought.

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“The Salary Thief in the Distillery”

“What does the vest do to me have anything to do with it?”

“There are limits to being a human being, I choose to be a cat…”

The magic version of Conan

- Description from novelbuddy

In order to chase down and kill her own murderer, Xia Yichu reached an agreement with the 233 system, and she will travel through the world to complete the task, and The 233 system helped her return to the original world.
However, Xia Yichu often encountered a broken BOSS while he was on his way to do the task. He did n’t agree with each other on the wall, the bed, the various patterns, and kept talking.
System: Please use one word to describe the other person’s impression in your heart.
Xia Yichu: Competent.
Shen Jiaye: Mine.

- Description from 69shu

The new book is out! Meng Yunhan has been reincarnated back to the time of ‘food coupon era’, a time when people struggled with food and clothe shortages. But she is not afraid this time around. Equipped with a ‘cheat code’, she is ready not only to start her own business but also to grab a hold of her stoned-face brother and even support Baozi, her child.Stoned-face brother: “Wife, let’s pack up Baozi and leave!” He claims that having a son who is even clingier to his wife than himself is utterly shameless!“Mommy, let’s get a new daddy!” Baozi suggests. His daddy, a grown man, is still so clingy to mommy. How disgraceful!