Isn’t Being A Wicked Woman Much Better? - Chapter 3: Chapter 3 – [Part 1]

A botched rescue mission with an unknown objective cost Zhou Yu his team members, while leading him progressively closer to the multinational biotech corporation Juli’s research core.

In order to protect his botanist younger brother Zhou Qing, Zhou Yu accepted employment under the Juli Corporation, and is dispatched to a parallel world—Nibelungen.

Nibelungen’s biological systems are completely different from the world Zhou Yu is from. To live in this place, Zhou Yu must follow three great laws:

The first law, fear is the sign of the hunted, so you must never show fear.

The second law, the more beautiful an organism is, the more dangerous they are. Do not approach them, and do not trust them.

The third law, do not be misled by the mimicry of S rank organisms. They understand your mind, and they know how to entice you. Always remember that they have no human emotions or love. All humans are no exception to them.

Finally: We wish everyone can live happily in Nibelungen.

- Description from Novelupdates

Su Shanshan died a violent death eight years into the apocalypse but somehow, she opened her eyes to find herself reborn. Time had turned back to the day before the apocalypse.

Having the chance to start over filled her with hope. Having lived through the bloody violence of the apocalypse, she now had the skills and knowledge to survive and thrive in the end times. She would repay the man who gave his life trying to save her even though she broke his heart.

The big brother whom she had reviled in her previous life. This time, she would take a chance on love.

As if blessed by the heavens, she had unexpectedly been given a spatial superpower, with which she hoarded resources that would sustain her in the apocalypse.

When the world changed in an instant on Doomsday, and hordes of flesh-eating zombies roamed the place, she set off on a dangerous journey to find him, determined to alter the course of events that unfolded and change what happened in the past.

Characters: Su Shanshan (beautiful, cold, proficient at martial arts), Gu Jincheng (rich, brilliant, awkward in affairs of the heart)

When others pass through, they are either all-powerful or proud of their lives, but when it was her turn, Jiang Liuer turned into a calamity.

The declining family, the unassuming father, the nerdy sister, and the black-bellied boy who popped out of nowhere… all of them are her calamity.

Jiang Liu did not hesitate, twisted Jie into a fortune with his chubby hands, and lived happily ever after.

- Description from novelbuddy

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.