Misaki, an office worker, was secretly in love with Oshima, the department manager. One day, Misaki happens to learn of Oshima's SM hobby. At first, Misaki is confused, but then she accepts his sexual preference "if it pleases you" and is trained through numerous SM plays such as restraints, spanking, exposure, and deep-throating, and day by day her dormant masochistic nature begins to blossom...