Stuck in The Marriage Pact - Chapter 1: The bride’s tension

Give me some ideas or references for the future plot of the story!

>English is not my main language as you all will see

>Will try my best to make the story enjoyable and can not promise that everyone will be happy as let's be real not all can be pleased

>The early chapters will be a bit slow-paced for the continuity of the story

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Meet Sora and Shiro, a brother and sister who are loser shut-ins by normal standards. But these siblings don’t play by the rules of the “crappy game” that is average society. In the world of gaming, this genius pair reigns supreme, their invincible avatar so famous that it’s the stuff of urban legend. So when a young boy calling himself God summons the siblings to a fantastic alternate world where war is forbidden and all conflicts–even those involving national borders–are decided by the outcome of games, Sora and Shiro have pretty much hit the jackpot. But they soon learn that in this world, humanity, cornered and outnumbered by other species, survives within the confines of one city. Will Sora and Shiro, two failures at life, turn out to be the saviors of mankind? Let the games begin…

Jiang Pengji got something called the Court Intrigue Stream System.
System: “Your goal is to become the most prestigious woman in the kingdom (the Queen)!”
Jiang Pengji: “Okay, System. No problem!”
Years later, she met the target by becoming the most prestigious woman (the Empress).
Jiang Pengji: “Well done, no?”

- Description from Novelupdates

He is an undead who is devoid of all humanity, he is the one and only supreme overlord, he is a man who has severe mysophobia.