The supporting character's harem is very normal - Chapter 134 Lathel… you are mine.

From the depths of a deep and blissful slumber, Chu Yu awoke to the vague sense of someone beside her. Among four of five men that she saw sleeping around her when she awoke, one in particular, caught her eye.'Who is he?'With his unrivaled elegance and the air of supremacy around him, he gazed upon the princess and asked, “What's wrong, Princess? Did you have a nightmare?”And with that, an uncontrollable chill rose up her spine that made her shiver despite the warmth of the room.Is it a joke? Or is it destiny?

Yuki, a high school junior, dies heroically saving a stranger and is reincarnated in a fantasy world, where he discovers an extraordinary and unrivaled power.

The eternal struggle between good and evil, Qin Shuang steps onto the path of cultivating, meeting various heroic individuals on her way to immortality, experiencing various events on her journey.

- Description from Novelupdates

“You must take her place... Just tonight!”****Aria Thorne is an Omega—lowest in the pack and lowest in her own home. Abused by her mother, hated by her twin sister Celeste, and treated like nothing more than a burden, Aria’s life has been nothing but pain and survival. But everything changes the day the Alpha’s royal guard arrives with a scroll in hand and a single, shocking message: the new Luna must come from Aria’s family… and she must be a virgin.Celeste can’t qualify. Aria does. But instead of celebrating her fate, Aria is forced to impersonate her sister in a cruel scheme—just to save her own skin and earn a sliver of love from the mother who blames her for the death of an unborn child. Dressed in her sister’s skin, Aria is sent to marry a powerful Alpha she’s never met. But what happens when the Alpha senses something’s off... and ends up claiming the wrong Luna?What starts as a lie soon sparks something deeper. A connection. A bond. A war.Can Aria survive in a world built to break her? Will the Alpha protect her once the truth comes out—or destroy her like everyone else ever has?