Haruka and her lover are preparing to get married. She also became a teacher, the job she dreamed of since childhood. But once when she was invited to a congratulatory party, she accidentally let another man touch her sensitive areas and was photographed by students. He threatened and forced her to have sex with him if she didn't want to spread it to the whole school. In the end, she had to accept and from then on she officially became her student's sex toy...