After endless overtime leaves Tsubaki sexually frustrated, she secretly masturbates in the office bathroom. Her older manager records her, uses the footage to blackmail her, and forces himself on her. She despises him, yet his huge cock satisfies the needs her premature-ejaculating boyfriend cannot. Deep stimulation and brutal thrusts drive her into repeated, humiliating orgasms. As the assaults continue, she becomes addicted to her boss's cock and eventually starts seeking sex with him herself.