Noelle, the daughter of an innkeeper, decides to marry into a wealthy merchant family in order to save her struggling family business. However, her heart remains attached to Io, a beastman young man who has been by her side since childhood and is someone very precious to her.

While preparing for her marriage, Noelle receives a devastating order from the local marquis, who declares that he will exercise his “right of the first night.” Faced with the prospect of entering a loveless marriage while also being forced to give up her first night to another man, Noelle is overwhelmed by despair.

Then, someone important appears before her.

Caught between her pure, devoted feelings and a love driven by deep possessiveness, Noelle's life is thrown into turmoil. A heartfelt romantic fantasy about childhood love, devotion, and an intense bond that refuses to let go.