In The Supreme Fantasy World, Back In Time And Do Whatever You Want! - Chapter 56 - . Let’s Start With Sister!

Shao Di Yu, an orphan, is adopted as a result of of a murder case involving the deaths of his entire family. Because of some painful experiences, he refuses to speak. However, he has sharp insight; moreover, he becomes under the care of a pair of twin brothers in the police force, who also have a child currently in university. Yu Yin possesses yin-yang eyes, which allow him to see things ordinary people cannot. The two brothers happen to complement each other, and together they investigate various inconceivable incidents.

Hyde arrives in a doomed world with nothing but his body and fragmented knowledge of the future from a game he once played. He has no grand ambition—why try to save a world already destined to fall? Survival is enough.That is, until he discovers his sister is also transported into that world.However, only he hears the Melody of Nightingale and receives the power to survive.[You have established a connection with The Forgotten Hollow.]Awakening as a Resonant—an elite group with supernatural abilities—he is thrust into a conflict between two worlds. Armed with the authority of space and time, he vows to protect his powerless sister at all cost, even if he has to fight against the Mirage creatures, other Resonants, or even Gods themselves.

Jiang Siyu and Bo Shiyan entered into a marriage agreement to divorce after 99 times.On the last occasion, Jiang Siyu wanted to have a child with the man, but he remembered the count and directly presented the divorce agreement.Jiang Siyu was stunned. Looking back at the three years of marriage, she had been obedient to him, yet she couldn't melt his icy heart.Fine, they had their fun, so divorce it is.After all, men don't age well, so it's not a bad deal for the white moonlight!Jiang Siyu chose to leave with nothing and disappeared.Five years later, she returned dominantly with her child, with all her secrets exposed.The man cornered her on the bed, “The Bo family has had only sons for ten generations, thanks for gifting me with twins...”Jiang Siyu didn't quite understand what Mr. Bo meant by this.

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.