Since elementary school, she was daily molested by her cousin's father in the bathroom. What began as mere mischief gradually escalated into sexual assault within the confines of that locked room, spiraling into an inescapable nightmare. As cases of bullying and sexual abuse against nieces surge across Japan, this work confronts that harsh reality, delivering a powerful message that such acts are never acceptable. The acts in complete isolation are extremely dangerous for both perpetrator and victim alike, serving as a dire warning to prevent further incidents like this from occurring.