MTL - Empress True Colors - Chapter 17v4 is it you?

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…

Li Ran traversed to another world and became the Holy Son of a Demon Way Sect.

The system has awakened, and the first task released is actually to fall in love?

The Sect strictly forbids relationships between men and women.

Li Ran took the risk of being expelled from the Sect and wrote a love letter to his junior sister, but it was sent to the master by mistake!

Qin Chuan arrived in a parallel world and got bound to a system.

How did he meet such a bandit-like man? He drags you away the second he sees you! And yet, the only thing he can do is try his best to set the boundaries between them.

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“Don’t you ever try to leave and reason things out. It’s futile. Yelling is also useless. This lao zi has already fallen for you and I shall make you mine.”

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“Be obedient and wait for me at home, so I can pamper you till the day I die.”

***

“Running away? What about it?

You dare to run away again and this lao zi will spend his lifetime seeing you try.”

- Description from Novelupdates