Rei Kakita, a brand-new teacher, gets her own class to teach for the first time at a unique school. This school values diversity and has a special system where each class can submit an amendment to the "class law" which takes precedence over the "school rules" if approved by the principal. Rei changes her class's laws to suit her preferences which catches the attention of another teacher who begins to blackmail her. Unable to resist, Rei accepts her co-worker's demands and she is forced to do increasingly depraved favors. However, something happens after a while as it seems that Rei's the one controlling the situation; only to reveal her true identity...