I Con the Prince Duan Yu from the Start, and Wang Yuyan Can't Stop Throwing Herself at Me

He transmigrates into a world of combined martial arts stories and, from the start, catches Duan Yu acting as Wang Yuyan's number-one simp.

The System activates: he can grow stronger simply by changing the plot! Su Chen can't stand watching, so he decides to fix the problem at its source.

He grabs hold of Duan Yu, who's looking utterly dejected:

“Future Emperor of Dali, stop simping! You'll end up with nothing. The only man in her heart is her cousin, who's trying to restore his kingdom!”

“Here's A Guide to Avoiding Pitfalls for the Duan Family of Dali. I don't want your Northern Darkness Divine Art or your Lingbo Weibu. Just stay away from Wang Yuyan, and I'll tell you who your father is!”

Duan Yu is shocked. “Y-you're talking nonsense! My father is, of course, the Prince of Zhennan!”

Su Chen sneers. “How naive! Your real father is Duan Yanqing, the leader of the Four Great Evildoers! Mu Wanqing and Zhong Ling, the girls you're pursuing now and used to like, are both your father's illegitimate daughters. They're your biological sisters!”

Duan Yu's entire worldview collapses on the spot, and he goes blank.

Years later, Su Chen has Wang Yuyan, who's finally seen the light and come to seek refuge, tucked under his left arm. In his right hand, he holds the Six Meridians Divine Sword manual “gifted” to him by Duan Yu. He watches the Emperor Duan Yu nearby dealing with the family problem of “which one of them isn't my sister?”

He thinks with satisfaction:

“Don't blame me, brother. I was only helping you avoid the biggest pitfall!”