One Piece: Capitalist Brook's Crew Expansion Plan - Chapter 43: Occupying Skypiea

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.

Xu Jiayan is sick, suffering from a condition where he can't stand to see Jiang Yuan cry. Whenever the young girl sheds tears, he just can't help but feel weak in the knees.However, one day, after accidentally catching a glimpse of her slender waist, he feels his condition has worsened.He finds himself wanting to make her cry,yet he has no desire to seek a cure—How fatal!One-liner:A pseudo-sweetheart vs. a true scholar;Childhood friends turn lovers with a twist of love and war;From school uniforms to wedding gowns, only accompanying you.

“Keep it in your mouth… Swallow it… Baby, be good…“

A mysterious natural phenomenon caused the Earth to be plunged into darkness. The world turned into an endless bloody chaos and mankind is on the brink of extinction…