Yandere heroine blocks my door, cold rival chases — even the male lead panics

Jiang Xia unexpectedly transmigrated into the world of a novel, becoming a supporting character who shared his name. Despite being ***, wealthy, talented, and deeply devoted to the female lead, his original fate was merely to serve as cannon fodder—a stepping stone for the protagonist to gain experience. Decrying the unfairness of his lot, he resolved to completely rewrite this wretched plot! After transmigrating, he awakened an overpowered "Regret System"—by making characters in the story feel regret, he could earn lavish rewards! Thus, Jiang Xia began stirring up chaos and deliberately distancing himself, granting the female lead her wish to stop pestering him. Yet, he never imagined the plot would go completely off the rails! The female lead, who had once treated him like trash, actually came to regret her actions; instead of staying away, she "darkened" into a *yandere* obsessed with binding him to her side forever! Even more absurdly, there were plenty of *other* women who wanted to claim him for themselves, too!