The supporting character's harem is very normal - Chapter 440 Trading

Do not betray your employer;
Do not betray your companions;
do not lie;
Rather than violate it, I would rather be silent.
These are the four laws that “The Silent One” has abided by for thousands of years.

Day and night we roamed the streets of the Yordian cities,
Dressed in Chinese clothes, wearing a mask, with a long sword on his waist and a dagger in his pocket.
We take lives and receive payment.
We are as humble as ants and as noble as kings.
We hold the power over the life and death of others.
I never cared when I died.

Content tags: Fantasy and Magic Romance of the West Revenge

Search keywords: Protagonist: Giuliano, Enzo ┃ Supporting role: Antoine ┃ Others: fantasy, fictional, assassin

- Description from novelbuddy

Ryo Tanaka, a struggling college student, works tirelessly at multiple part-time jobs to make ends meet. In a bid to earn some extra cash, he volunteers for a paid drug research study, unaware that it will alter the course of his life forever.The experiment takes a disastrous turn, leaving Ryo bedridden with a high fever for several days. But when he finally awakens, he finds himself in a world plunged into chaos. A deadly virus has ravaged the city, turning its inhabitants into ravenous, flesh-eating zombies. Streets once bustling with life now lay desolate, the remnants of civilization crumbling under the weight of the apocalypse.

What could be worse than getting married to a demon prince as a human princess for a forced truce?Being in a place surrounded by demons was like a nightmare to Aelin. Demons and humans have always despised each other after all. But things only go downhill, when her husband leaves her shortly after they spend a night together to go fight a war with unknown beings which leaves Aelin at the mercy of her enemies

Six years ago, he disappeared silently! After six years, he becomes the unparalleled "God of War" and returns with glory, only to find that he has a daughter whom he never knew of. Looking at his wife and his daughter, he says, "In this lifetime, I'll bring you the greatest honor and glory!”