A former office worker reincarnates as Prince Ashel, a young man with an angelic appearance who lives in a fantasy kingdom. Expecting a cheat-level life, he instead discovers that the previous Ashel was a cruel and tyrannical prince, despised by everyone in the castle—including his two older half-brothers, his younger half-brother, the servants, and especially the nation’s hero, the black knight Theodore. As memories of his past self resurface, Ashel realizes he is isolated and hated. Rather than accept this fate, he decides to do everything he can to repair the broken relationships around him.

The story follows Ashel’s sincere efforts to atone for his predecessor’s misdeeds by showing kindness, humility, and a genuine desire to change. Slowly, those around him begin to soften, but the path is not easy. Theodore, a half-beastman who was originally Ashel’s harshest detractor, harbors a conflicted attraction: his instincts recognize Ashel as his fated mate, while his mind still resents the prince he once knew. As Ashel and Theodore grow closer, their bond deepens into a romantic relationship complicated by social status—Ashel is a prince, and Theodore is a commoner.

Meanwhile, the royal court pressures Ashel to either marry into a foreign royal family or enter the temple as a divine child. The temple’s high priest, Reacher Alf, arrives to recommend Ashel for the role, threatening to separate him from Theodore. As political intrigue mounts, Ashel must navigate his family’s lingering distrust, the kingdom’s strict class hierarchy, and the machinations of those who see him as a pawn. A poisoning incident sends Ashel into a coma, where he confronts the guilt of his past life and the misunderstandings that have long plagued his family. Upon awakening, he finds his brothers and father have finally accepted him—but Theodore is missing, and Ashel’s body begins to change as his fated-mate bond calls out for his partner.

The story concludes with Ashel and Theodore overcoming the obstacles of class and duty, securing their bond as mates, and achieving a hard-won reconciliation with the royal family, proving that even a deeply hated prince can earn love through persistent effort and genuine change.