MTL - Ninja World: I’m Not a Human Being! - Chapter 313

A wonder falling down from heaven! A boy possessed by strange blood! Gods tremble! Demons flee! A boy from the land of Dong Zhou. A pink skull as his sworn friend until death. A story of a determined warrior struggling for power. A legend that shakes the galaxy and disturbs the worlds of god, demon and man.

- Description from Novelupdates

Akira, was born in the slum and wishes to get out but the only way he could was to risk his life in these ruins as a hunter.

Feng Chen, the esteemed head of the Feng Clan, had lived a peaceful life for thirty years since his transmigration. He believed his life would continue as it is—until his 30th birthday, when his System finally arrived!But along with that came the plot for the Main Character.Ling Meiyu: “I can no longer be engaged to Feng Yun. His cultivation is low, and he is unworthy of my Ling family’s status!”Feng Yun: “Today, it’s not you, Ling Meiyu, withdrawing from the engagement. It’s me, Feng Yun, repudiating you! I am divorcing you today!”It seems like my brother is the protagonist!

Zavier met Cosmic Consciousness after his death. He was satisfied with every system that Cosmic Consciousness exhibited, so he wanted all of them. Surprisingly, the Cosmic Consciousness obliged him.

Zavier was reborn in an isekai full of magic and alchemy. Now, he had many routes to upgrade. Interestingly, to coordinate these systems, Cosmic Consciousness gave him the gift of being able to duplicate himself. He could clone a finite number of himself to manipulate these systems.

Magus, Alchemist, Mesmer, Tamer, Hunter, Vampire, Werewolf, Dragonknight, Necromancer.....

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By the way, it wouldn't appear NTR or some bullshit harem of courtships. MC of course will have harem but not for cliches.