Rin has just come from the countryside. She is plain and shy. She is weak to pressure, and cannot resist when her superiors tell her to do something forceful. One day, she finds a poster advertising a part-time job at a nearby convenience store, and while she is unsure, the manager calls out to her and hires her. Even in her convenience store uniform, her large breasts cannot be hidden and she falls into the manager's trap. Whenever she goes to the convenience store, the manager, whom she hates, does lewd things to her, and even though she knows this, she cannot quit her part-time job. What is the reason for this...? "It's not enough to just touch myself, these nipples have turned into nipples that want it."