The supporting character's harem is very normal - Chapter 80 Lilith vs Amleth

Zhao Feng is reborn as a soldier in the Qin state during the Warring States period, exactly when the legendary Emperor Qin Shi Huang is annihilating the other six kingdoms. He is assigned to the Logistics Army, responsible for clearing the battlefield and carrying corpses.But for Zhao Feng, there's no better job than this.Touching a corpse.【Picked up 1 point of strength】, 【Picked up 1 point of speed】, 【Picked up 1 point of constitution】, 【Picked up 1 point of spirit】, 【Picked up 1 point of lifespan】.Touching an elite corpse.【Picked up 5 points of strength】, 【Picked up 5 points of lifespan】.Killing an enemy, attribute pick-ups doubled.【Picked up 10 points of strength】.【Picked up 10 points of lifespan】.

Zheng Tan somehow returns to the year 2003, turning into a black cat. Picked up from a rubbish heap by the Jiao family, he is given the name “Charcoal”, and so begins the life inside Professor Jiao’s family. Zheng Tan remembers that he was once a person, but currently his body is that of a cat. He has no way of speaking the human language, but can understand it, and even retains the thinking and IQ of a young 20 year old youth. Read along as he adapts to this new world, and somehow tumbles from a group brawl to catching a thief.

- Description from Novelupdates

After a brutal attack leaves him for dead, Alex awakens in a new world unlike any he has ever known. Reborn into a prestigious family, he is thrust into a realm where power defines worth, and ancient secrets lie hidden beneath layers of intrigue.Determined to seize this second chance, Alex must navigate dangerous family rivalries, uncover the truth about the enigmatic woman who saved him, and master the powers now at his disposal. As he delves deeper into mysteries, he finds himself at the center of a growing conflict—one that could shape the fate of this world and his place within it.Will Alex rise to the challenge and rewrite his destiny, or will the forces against him ensure his downfall once again?

Haruki arrives in the Naruto world and before he could take a breather, a ninja, holding a sharp blade, rushes towards him.“…”He closed his eyes and prepared for a second transmigration.Unexpectedly, a pair of huge claws stretched out from behind him and twisted the ninja in front of him.“Yuta...”“Don't hurt Yuta...”Haruki opened his eyes and saw a face that was extremely terrifying.Isn't this the Queen of Curses Rika from Jujutsu Kaisen?…[Congratulations to the host for successfully calming down the companion cursed spirit who was in a rage—Rika Orimoto!][The Cursed Spirit Mother Auxiliary System has been successfully activated!][The King of Curses Ryomen Sukuna... Waiting to be activated! ][Host Identity Template——Yuta Okkotsu][Please activate Yuta Okkotsu's main ability!]