The supporting character's harem is very normal - Chapter 460 Arriving at the Academy

Youyou is a mother’s precious daughter. The word she often talks about is: “My mother said…” Therefore, many people laughed at her for not being weaned, but Xu Youyou didn’t care, she still went her own way, determined to be the best mother’s baby girl.
In high school, Xu Youyou was pressed by the domineering school grass against the wall to confess. Xu Youyou frowned and refused: “No, my mother said that the most important thing for students is to study! Otherwise, they will become the scum of society in the future!” Someone who has a single-digit score and hates studying: “….”
In college, a rich and handsome president He wanted to use favorable conditions to help Xu Youyou, but got a contemptuous look from Xu Youyou: “My mother said, there is no such thing as getting something for nothing, if there is, there must be a conspiracy!” The president who wanted to find white moonlight substitute: “….”
*5874 is a system whose mission is to change the miserable fate of the abused heroine Xu Youyou and make her happy. But, look at the little beany who is only three years old in front of her, and look at the terrible environment of the orphanage. The system decides to tell a lie “Youyou don’t be afraid, I’m your mother.”
After fifteen years of conscientious teaching, the system fell into a deep sleep due to a lack of energy. When it woke up again and found Xu Youyou living in a beautiful villa with countless jewels and beautiful clothes. The system was heartbroken: “Baby, why are you still …” Xu Youyou is excited: “Mom! You finally woke up! You were right! The best money in the world is money earned from loving a brainy man! System: “… Did I say that?”

- Description from Novelupdates

[DING!][Congratulations, APOLLYON. You have unlocked the Infernal System!][NAME: Israfel BlüdThïrste.][FACTION: DEMON ¢ RANK A.][DING!][You have ascended to the realms of man.][CITY: The medieval Empire of Eldoria.][ALL HAIL THE BURNING ONE!][CONQUEST: Level Up to NINTH INFERNAL CIRCLE.][The battle for DOMINION begins.][SYSTEM has graciously provided the most delicious and bosomy babes to compete for MC.][WARNING: This book features detailed descriptions of female humiliation, hardcore sex and depravity. There is a guaranteed Adult Chapter one out of every five. NOT FOR CHILDREN! NOT FOR SOFT HEARTS!]• FULL BLURBIsrafel BlüdThïrste was born in Hel. He has lived in it all eighteen years of his life. As seventh in the bloodline of the Morningstar himself, Rafel has had a pretty fucking great life. There's spilled blood in excess. Violence to choke the gray skies. Abundant sex—depraved and hardcore. And more blood. Everything a Prince of the Abyss could desire. But Rafel has heard stories, of the world above. The world of the weak mortals whose damned souls fall endlessly through the red skies of his, to meet with perpetual torture. Stories of their fine carriages and legendary kings. Their golden sun and green earth. But mostly, their virgin women. He wishes to see it for himself. And so, when a lucky gambit with his dear Aunt, Lilith, opens up a way for him to explore the surface, Rafel hops to it.The deal is a hundred years before he has to return to his duties as Hell's Apollyon.Accompanied by his new slave, a voluptuous horned Succubus, Rafel journeys to the mortal realm, entering into the mythical lands of Eldoria as the enigmatic Earl of Emberfall, a haunted estate. But Rafel intends to rise, into the very courts of the Eldorian Queen. At least before his time runs out. And if corrupting, blackmailing, fucking, and murdering a few mortals gets in his way, so be it.This is until the haloed mess of Ravenna de Vries ends up on the grand steps of his Manor, soaking wet with a blood debt hanging over her head. Israfel had seen many beautiful women in his time, but somehow the little mortal girl is sufficient to make him rethink his gambit.Ravenna is owed to a powerful Hell Principality. And though Rafel convinces himself that building up his power ranking is solely selfish, it also has to do with going up against an ancient adversary from his home who is certain to appear just about anytime to collect what he is owed—Ravenna.She is not his responsibility, but why does Rafel feel exactly that whenever he looks at her? And suddenly for this Immortal, a hundred years is not enough to fall in love.

Ming Luo is a wasted daughter of the Duke Yi’s household. Her father forced her to study medicine but it was not a wise choice since she was of no use. Her sister from a different mother uses underhanded schemes to get rid of her. Out of guilt and frustration, she tries to commit suicide. Everyone thought she was going to die but she miraculously woke up.

Humans of Earth were transported to the Divine Sky Realm, a world brimming with fortune and danger.In this celestial domain, humanity now dwells upon floating islands, ascending as rulers. When else will you get the chance to be a king and vie for supremacy?The system bestowed powers upon chosen individuals, granting limitless luck. Lein, an ordinary office worker, received the SSS-rank talent - Infinity Duplicate.There was nothing in this world that he couldn't duplicate, not even god-tier materials. The path to becoming the strongest lay before him. Yet, Lein knew all too well that it required a process.Even the gods needed a process to create the universe.The Divine Sky Realm offered a fantastical life that Earth's humans had always dreamed of. Soaring through the skies, shattering mountains, rising to the pinnacle in all endeavors. But humans remain humans, wherever they are, driven by their innate nature: greedy and unaware of their limits.Humans believed they were the sole inhabitants of the universe, thinking only they received the system's fortune. But reality proved otherwise. Other races in the universe were granted the same blessings, without distinction. In fact, the human physique was considered low-tier.Races like the Wood Elves, Dwarves, Goblins, Dragons, and countless others possessed bodies that defied the heavens from the outset. Could humans survive in the Divine Sky Realm? We can only hope for the best.The humans found themselves in a realm where dreams and nightmares walked hand in hand, a place where every desire and fear took form. Floating islands became their new kingdoms, a testament to their newfound power and ambition. Lein, an unremarkable man back on Earth, now wielded the power of Infinity Duplicate, a gift that could make him invincible.