Sae Tomoda is a beautiful office lady whose life at work takes a dark turn when she becomes the target of relentless bullying from an unknown colleague. The harassment intensifies with each passing day, yet the identity of the perpetrator remains hidden, casting a shadow of suspicion over the entire office. Adding to the tension, Tomoda herself is engaged in a secret affair with the company president, a liaison that further complicates her position and motivations. The workplace atmosphere grows increasingly fraught as employees turn on one another, jumping at shadows and questioning who can be trusted. The story unfolds within a Japanese corporate office setting, a space where professional facades mask personal vendettas, hidden relationships, and psychological warfare. The central narrative arc revolves around the dual mystery of who is tormenting Tomoda and what she might be willing to sacrifice—or destroy—in her pursuit of personal happiness. As the lines between victim and culprit blur, the manga raises the question of whether anyone in the office is truly innocent.