Don't Turn Dark, Yandere

Xie Tang unfortunately transmigrates into a novel as a cruel female supporting character who abuses Yandere Yan Yunshen. To reverse her fate of being avenged by the yandere, she decides to rewrite the plot and refuse to be a cannon fodder. Thus, Xie Tang starts backing Yan Yunshen against evil people, showing him warmth and helping him resolve his heart's knots. Finally, she finds an opportunity to escape, but unexpectedly, this yandere man ignores her completely and instead only wants to imprison Xie Tang by his side!