Orie Yuuki is the class representative at Keisuke Shimizu's school. Driven by a desire to reform his misogynistic worldview, which stems from severe domestic issues, she believes demonstrating genuine love's power can change his perception of women as mere sexual objects.

To achieve this, Orie enters a three-month contract to become Keisuke's sex slave. This arrangement functions as a bet: she aims to endure without deriving pleasure, intending to compel Keisuke's reform if she succeeds. She operates under the conviction her sacrifice will rehabilitate him.

However, Orie significantly underestimates the arrangement's psychological and emotional repercussions. She possesses no prior comprehension of the potential consequences for her well-being or future, particularly regarding Keisuke's lingering attachment to a former lover and the inherent dangers involved. The situation rapidly escalates beyond her control, propelling her into psychological turmoil and unforeseen circumstances. The agreement initiates a chain of events characterized by manipulation and loss of autonomy, fundamentally altering her life.

Her background beyond being a diligent student and class representative is not detailed. Her actions derive solely from her commitment to reforming Keisuke, with no indicated prior personal connection. The narrative emphasizes her naivete and lack of foresight regarding the arrangement's risks.

Throughout the story, Orie experiences significant deterioration in her initial idealism and psychological stability. The three-month agreement leads her into escalating cycles of vulnerability and psychological distress, culminating in a loss of agency. No subsequent character development, redemption arc, resolution of her relationship with Keisuke, or personal recovery is documented within the available narrative.