The fourth volume of「破滅予定の悪役令嬢なのにラスボス公爵と婚約するんですか！？」pushes its reborn heroine into direct conflict with a spy from a rival nation, setting the confrontation on the grounds of her own family's estate. It is a setup that promises more than swordplay: this is a story that cares about strategy, misdirection, and the quiet satisfaction of watching a careful plan unfold.

Readers who enjoy heroines that think their way out of trouble will find plenty to like here. The heroine sets a trap meant to outmaneuver her opponent, and for a moment it works. But the spy's subordinates crash the scene, flipping the situation and leaving her taken hostage. The shift from calculated triumph to sudden danger is handled with attention to pacing, letting the tension build rather than rushing past it.

What keeps the story distinct from a simple cat-and-mouse thriller is its reincarnation premise. The heroine was never meant to be the hero of this tale; she was cast as a villainess destined for ruin. Her goal now is less about saving the kingdom and more about personal survival, driven by a wish to live long enough to see a favorite character she has been rooting for. That blend of self-aware humor and real stakes gives the brains-first plotting an emotional anchor.

Fans of stories about reborn or reincarnated heroines navigating noble politics, spies, and shifting alliances will find familiar pleasures here, refreshed by a heroine whose motivations are refreshingly personal rather than purely heroic. The hostage twist in this volume suggests the writers are willing to let danger feel real even within a story that keeps a light, self-aware tone running underneath.

Altogether, this is a good pick for readers who like their romantic intrigue paired with tactical thinking, reversals of fortune, and a heroine whose sense of humor about her own doomed role never quite overshadows the genuine tension of her circumstances.