Ichiban Chikakute, Tooi Futari

When Ai was just a young girl, her life changed with the arrival of her newly adopted sister. Though they grew up together under the same roof, their adult lives within the school's walls have placed them on vastly different paths. Now older and holding positions of responsibility at their academy, the two sisters occupy roles that put them in constant, complicated proximity to one another. Ai serves as a dedicated member of the school disciplinary committee, tasked with maintaining order and upholding the institution's strict regulations. Her adopted sister, meanwhile, works as the school doctor—a role she uses not only for medical care but also as an opportunity to engage in inappropriate "play" with the female students. This troubling behavior creates a tense dynamic between the siblings, forcing Ai into a difficult position where her familial bond clashes directly with her professional duties. As Ai confronts her sister over these blatant violations of school rules, the nature of their interactions becomes increasingly ambiguous. Is her relentless scolding driven purely by a commitment to discipline and the protection of the student body, or is there a deeper, more personal motivation hidden beneath her stern reprimands? The line between enforcing the law and navigating their complex relationship begins to blur, leaving the true intent behind Ai's actions open to question.