I Fell into the Game with Instant Kill - Chapter 98: Assassination of the Tower Master (1)

Rebecca imagined many things after finishing university; dying was not among them.Being reborn as the twin Sister to a different worlds Hero, and dealing by default with his opponents certainly wasn't what she imagined either.English is not my first language, so there will be mistakes. I will try to avoid them but make no promises.----The world this story is playing in, and the characters that are in the original story all belong to Tang Jia San Shao.

Briar had always harbored a crush in her heart. However, with her status as the official nanny of the Meyer family, she knew her chances were close to zero. After all, there were many other eligible women out there and it was not in her place to cross this line.All it took was one crucial call from home and she found herself signing a contract she never dreamed was possible.The man she had pinned after for years, Logan Meyer, needed a trophy wife, an accessory to hang on his arm, and a mother to his three kids. And as the nanny his children were used to seeing, Briar happened to fit the bill.She needed the money to save a relative. But more than that, this was an opportunity for her to reach the forbidden fruit she could only see but not touch for years.However, when the secrets of her past, which she wished to have forgotten and had locked in Pandora’s Box over twelve years ago, threaten to come out. The kind that would shatter the image she had painstakingly forged, thwart everything that she had worked hard for all these years and send her to prison for the rest of her life, forcing her to part with the man she dearly loves.To stop her adversaries from destroying everything that she had dreamt of since she was a child, Briar would be forced to make choices. Choices that would change her life forever.Even if it means shedding all pretenses and revealing her true self.

After breaking up with his girlfriend, he accidentally acquired a genius system and rose from there against the heavens, becoming invincible..

- Description from Novelupdates

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.