Falsely accused, Reynaldo vows revenge after his beloved elder sister, Rosemary, is executed.

His only reason for living was the promise that he would one day make those who killed his sister suffer more than she did.

Twenty years have passed since his sister's death.

The day to finally exact his revenge draws near.

During those two decades, his beloved sister was reincarnated and reborn as Marie.

Having regained her memories of her past life, Marie desired to live a peaceful existence this time, drawing from her past experiences.

Yet, against her wishes, Marie finds herself returning to the royal palace, where she reunites with her former younger brother.

Marie is bewildered by Reynaldo, the younger brother she doted on in her previous life, who has become a completely different man.

Meanwhile, Reynaldo finds himself drawn to Marie, who reminds him of the beloved sister he lost.

But the time for revenge is fast approaching.

This is a story about a former sister who wishes not for revenge, and her former brother who desires nothing but revenge.

*This is an "if" story of "The Reincarnated Villainess Does Not Wish For Revenge," but can be read independently from the main story.