The supporting character's harem is very normal - Chapter 63 Blood contract

People in the World of Naruto: Drinking Makes You Stronger
 Author: Half a Piece of OrangeYouyu, a man who found himself transported into the Naruto world, awakened a rather unusual system:The more he drinks, the stronger he becomes!• Raikage: “What?! I have the strongest defense—wait, why did Youyu just slice through me while drinking?!”• Hiruzen Sarutobi: “That guy’s a monster. I’ve never seen him train, only drink... yet he still cut me down in an instant.”• Madara Uchiha: “Dancing? Tch. That drunk bastard swayed his way over and chopped me up!”• Obito Uchiha: “Damn it! Even space-time jutsu can’t stop that drunk maniac!”Youyu: “My hobbies? Drinking... and cutting people down.”

# LORDXu Yuan transmigrated to a parallel world where everyone became lords. Initially, he thought he would be a lord too. To his surprise, he became the Dark Demonic Dragon, a starter hero awaiting to be summoned by a lord. He also awakened the Dragon God Cultivation System.[Transformation of the Dark: You can level up quickly by staying in the dark.][Slumber of the Dragon God: For the Dragon God, sleeping means residing in the dark.][Rejuvenation of the Demonic Dragon: You can revive using the power of the dark. Your basic attribute points will increase every time you revive.][The Blade of the Hidden Wings: This is a dark attribute AoE skill. It can annihilate all enemies within the area of effect.][Unlimited Devouring: The skills of your enemy shall be yours now. Unleash this skill to devour your enemy and acquire their skills.]…Su Wan, a beautiful lord, had no doubt that she could easily become the most powerful lord in the universe.She felt her heart beating fast when she first saw her starter hero dazzle amidst the flashing summoning light.Unbeknownst to her, her nightmare was about to unfold.While other heroes devoted themselves to training day and night in order to level up, her hero goofed around and showed no effort to improve himself.While other heroes charged into the enemy’s base and valiantly killed off their foes, her hero hid in their base and slept soundly....As time passed, Su Wan slowly discovered that there was more to her hero than met the eye.

Karl transmigrated into a new world, and once he reached the age of 18, the day of the profession awakening ceremony came.In this world, your strength and profession determined everything about your life, with no second chances.And with nobody to support him, it was make or break for Karl.Yet, once his turn arrived, and he closed his eyes...He woke up in a strange and unfamiliar place.[Welcome to the Spirit Cemetery]A skeletal figure appeared before his eyes: it was death, revealing itself to him.“What the...”But before he could even understand the situation he was in, he heard a notification.Ding![You have awakened the EX-Rank profession “Spirit Summoner”][This is your Spirit Cemetery, find a way to fill it.]

Until he became the lowest-ranked master, his lonely and luckless life never changed.

Suddenly one day, a descendant injected him with a nanomachine, and the machine started ‘speaking’ to him.

“What? What are you talking about?”

This was beyond the boy’s knowledge, he turned pale.

The Nanomachine linked to his cerebrum realized the User was not understanding a single word it said.

“Who are you, and why are you doing this to me?”

“Nano Mashin?”

The boy’s face hardened.

Mashin was the deity the Mashin Religion worshipped, along with the Sacred Fire.

The religions’ Master communicated with Mashin.

“Um, are you really Mashin?”

The boy knelt down and asked with a trembling voice. At this, the Nanomachine attached to his cerebrum realized it had been misunderstood.